.Net: docs: fix 20 broken sample links in GettingStartedWithAgents README (#14699)

## Motivation

The sample tables in `dotnet/samples/GettingStartedWithAgents/README.md`
contain 20 broken links:

1. **18 links use a wrong path prefix** — they were written as
`./dotnet/samples/GettingStartedWithAgents/...`, but the README itself
already lives in `dotnet/samples/GettingStartedWithAgents/`, so the
links resolve to a doubled path and 404 on GitHub. The BedrockAgent,
CopilotStudioAgent and Orchestration sections in the same file use
correct relative paths (e.g. `./BedrockAgent/...`), which makes the
inconsistency clear.
2. **2 links point to renamed files** in the `Orchestration/` folder:
`Step02a_Sequential.cs` is now `Step02a_SequentialCancellation.cs` and
`Step04b_HandoffWithStructuredInput.cs` is now
`Step04a_HandoffWithStructuredInput.cs`.
3. **1 entry points to a removed sample**: `Step03_AzureAIAgent_Chat.cs`
was removed and replaced by `Step03_AzureAIAgent_Vision.cs` in #12348
(both changes in the same commit), but the README row was never updated.

## Changes

All in `dotnet/samples/GettingStartedWithAgents/README.md` (20 lines):

- Agent section (7 links): strip the wrong
`./dotnet/samples/GettingStartedWithAgents/` prefix.
- OpenAIAssistant section (5 links): same prefix fix.
- AzureAIAgent section (6 links): same prefix fix; additionally the
Step03 row now points to `./AzureAIAgent/Step03_AzureAIAgent_Vision.cs`
with its title and description updated to match the replacement sample.
- Orchestration section (2 links): update to the renamed
`Step02a_SequentialCancellation.cs` and
`Step04a_HandoffWithStructuredInput.cs`.

## Verification

- Every new link target was verified to exist on the current `main` tree
(file listing of `dotnet/samples/GettingStartedWithAgents/`,
`OpenAIAssistant/`, `AzureAIAgent/`, `Orchestration/`).
- The removal of `Step03_AzureAIAgent_Chat.cs` and addition of
`Step03_AzureAIAgent_Vision.cs` were confirmed via the commit history of
the `AzureAIAgent` folder (#12348); the new description mirrors the
wording of the OpenAIAssistant Vision row.
- No text outside the affected table rows was modified.

> [!NOTE]
> This documentation fix was prepared with AI assistance (an automated
contribution workflow). Happy to adjust anything — e.g. if you prefer
keeping the old `Step03_AzureAIAgent_Chat` row title or handling it
differently.

Author: leom1919

dotnet/samples/GettingStartedWithAgents/README.md

@@ -22,34 +22,34 @@ The getting started with agents examples include:
 
 Example|Description
 ---|---
-[Step01_Agent](./dotnet/samples/GettingStartedWithAgents/Step01_Agent.cs)|How to create and use an agent.
-[Step02_Plugins](./dotnet/samples/GettingStartedWithAgents/Step02_Plugins.cs)|How to associate plug-ins with an agent.
-[Step03_Chat](./dotnet/samples/GettingStartedWithAgents/Step03_Chat.cs)|How to create a conversation between agents.
-[Step04_KernelFunctionStrategies](./dotnet/samples/GettingStartedWithAgents/Step04_KernelFunctionStrategies.cs)|How to utilize a `KernelFunction` as a _chat strategy_.
-[Step05_JsonResult](./dotnet/samples/GettingStartedWithAgents/Step05_JsonResult.cs)|How to have an agent produce JSON.
-[Step06_DependencyInjection](./dotnet/samples/GettingStartedWithAgents/Step06_DependencyInjection.cs)|How to define dependency injection patterns for agents.
-[Step07_Telemetry](./dotnet/samples/GettingStartedWithAgents/Step07_Telemetry.cs)|How to enable logging for agents.
+[Step01_Agent](./Step01_Agent.cs)|How to create and use an agent.
+[Step02_Plugins](./Step02_Plugins.cs)|How to associate plug-ins with an agent.
+[Step03_Chat](./Step03_Chat.cs)|How to create a conversation between agents.
+[Step04_KernelFunctionStrategies](./Step04_KernelFunctionStrategies.cs)|How to utilize a `KernelFunction` as a _chat strategy_.
+[Step05_JsonResult](./Step05_JsonResult.cs)|How to have an agent produce JSON.
+[Step06_DependencyInjection](./Step06_DependencyInjection.cs)|How to define dependency injection patterns for agents.
+[Step07_Telemetry](./Step07_Telemetry.cs)|How to enable logging for agents.
 
 ### Open AI Assistant
 
 Example|Description
 ---|---
-[Step01_Assistant](./dotnet/samples/GettingStartedWithAgents/OpenAIAssistant/Step01_Assistant.cs)|How to create an Open AI Assistant agent.
-[Step02_Assistant_Plugins](./dotnet/samples/GettingStartedWithAgents/OpenAIAssistant/Step02_Assistant_Plugins.cs)|How to associate plug-ins with an Open AI Assistant agent.
-[Step03_Assistant_Vision](./dotnet/samples/GettingStartedWithAgents/OpenAIAssistant/Step03_Assistant_Vision.cs)|How to provide an image as input to an Open AI Assistant agent.
-[Step04_AssistantTool_CodeInterpreter_](./dotnet/samples/GettingStartedWithAgents/OpenAIAssistant/Step04_AssistantTool_CodeInterpreter.cs)|How to use the code-interpreter tool for an Open AI Assistant agent.
-[Step05_AssistantTool_FileSearch](./dotnet/samples/GettingStartedWithAgents/OpenAIAssistant/Step05_AssistantTool_FileSearch.cs)|How to use the file-search tool for an Open AI Assistant agent.
+[Step01_Assistant](./OpenAIAssistant/Step01_Assistant.cs)|How to create an Open AI Assistant agent.
+[Step02_Assistant_Plugins](./OpenAIAssistant/Step02_Assistant_Plugins.cs)|How to associate plug-ins with an Open AI Assistant agent.
+[Step03_Assistant_Vision](./OpenAIAssistant/Step03_Assistant_Vision.cs)|How to provide an image as input to an Open AI Assistant agent.
+[Step04_AssistantTool_CodeInterpreter_](./OpenAIAssistant/Step04_AssistantTool_CodeInterpreter.cs)|How to use the code-interpreter tool for an Open AI Assistant agent.
+[Step05_AssistantTool_FileSearch](./OpenAIAssistant/Step05_AssistantTool_FileSearch.cs)|How to use the file-search tool for an Open AI Assistant agent.
 
 ### Azure AI Agent
 
 Example|Description
 ---|---
-[Step01_AzureAIAgent](./dotnet/samples/GettingStartedWithAgents/AzureAIAgent/Step01_AzureAIAgent.cs)|How to create an `AzureAIAgent`.
-[Step02_AzureAIAgent_Plugins](./dotnet/samples/GettingStartedWithAgents/AzureAIAgent/Step02_AzureAIAgent_Plugins.cs)|How to associate plug-ins with an `AzureAIAgent`.
-[Step03_AzureAIAgent_Chat](./dotnet/samples/GettingStartedWithAgents/AzureAIAgent/Step03_AzureAIAgent_Chat.cs)|How create a conversation with `AzureAIAgent`s.
-[Step04_AzureAIAgent_CodeInterpreter](./dotnet/samples/GettingStartedWithAgents/AzureAIAgent/Step04_AzureAIAgent_CodeInterpreter.cs)|How to use the code-interpreter tool for an `AzureAIAgent`.
-[Step05_AzureAIAgent_FileSearch](./dotnet/samples/GettingStartedWithAgents/AzureAIAgent/Step05_AzureAIAgent_FileSearch.cs)|How to use the file-search tool for an `AzureAIAgent`.
-[Step06_AzureAIAgent_OpenAPI](./dotnet/samples/GettingStartedWithAgents/AzureAIAgent/Step06_AzureAIAgent_OpenAPI.cs)|How to use the Open API tool for an `AzureAIAgent`.
+[Step01_AzureAIAgent](./AzureAIAgent/Step01_AzureAIAgent.cs)|How to create an `AzureAIAgent`.
+[Step02_AzureAIAgent_Plugins](./AzureAIAgent/Step02_AzureAIAgent_Plugins.cs)|How to associate plug-ins with an `AzureAIAgent`.
+[Step03_AzureAIAgent_Vision](./AzureAIAgent/Step03_AzureAIAgent_Vision.cs)|How to provide an image as input to an `AzureAIAgent`.
+[Step04_AzureAIAgent_CodeInterpreter](./AzureAIAgent/Step04_AzureAIAgent_CodeInterpreter.cs)|How to use the code-interpreter tool for an `AzureAIAgent`.
+[Step05_AzureAIAgent_FileSearch](./AzureAIAgent/Step05_AzureAIAgent_FileSearch.cs)|How to use the file-search tool for an `AzureAIAgent`.
+[Step06_AzureAIAgent_OpenAPI](./AzureAIAgent/Step06_AzureAIAgent_OpenAPI.cs)|How to use the Open API tool for an `AzureAIAgent`.
 
 ### Bedrock Agent
 
@@ -77,12 +77,12 @@ Example|Description
 [Step01_Concurrent](./Orchestration/Step01_Concurrent.cs)|How to use a concurrent orchestration..
 [Step01a_ConcurrentWithStructuredOutput](./Orchestration/Step01a_ConcurrentWithStructuredOutput.cs)|How to use structured output (with concurrent orchestration).
 [Step02_Sequential](./Orchestration/Step02_Sequential.cs)|How to use sequential orchestration.
-[Step02a_Sequential](./Orchestration/Step02a_Sequential.cs)|How to cancel an orchestration (with sequential orchestration).
+[Step02a_SequentialCancellation](./Orchestration/Step02a_SequentialCancellation.cs)|How to cancel an orchestration (with sequential orchestration).
 [Step03_GroupChat](./Orchestration/Step03_GroupChat.cs)|How to use group-chat orchestration.
 [Step03a_GroupChatWithHumanInTheLoop](./Orchestration/Step03a_GroupChatWithHumanInTheLoop.cs)|How to use group-chat orchestration with human in the loop.
 [Step03b_GroupChatWithAIManager](./Orchestration/Step03b_GroupChatWithAIManager.cs)|How to use group-chat orchestration with a AI powered group-manager.
 [Step04_Handoff](./Orchestration/Step04_Handoff.cs)|How to use handoff orchestration.
-[Step04b_HandoffWithStructuredInput](./Orchestration/Step04b_HandoffWithStructuredInput.cs)|How to use structured input (with handoff orchestration).
+[Step04a_HandoffWithStructuredInput](./Orchestration/Step04a_HandoffWithStructuredInput.cs)|How to use structured input (with handoff orchestration).
 
 ## Legacy Agents