Update docs for new 'a365 config permissions' command

Replaced deprecated 'init --custom-blueprint-permissions' usage with 'config permissions' in Readme-Usage.md, including Copilot Studio setup instructions. Added [Collection("ConfigTests")] to ConfigurationWizardServicePermissionsTests.cs for improved test grouping.

Author: sellakumaran

Readme-Usage.md

@@ -56,15 +56,14 @@ a365 config init --global
 **Configure custom blueprint permissions:**
 ```bash
 # Add custom API permissions for your agent
-a365 config init --custom-blueprint-permissions \
-  --resourceAppId 00000003-0000-0000-c000-000000000000 \
+a365 config permissions --resource-app-id 00000003-0000-0000-c000-000000000000 \
   --scopes Presence.ReadWrite,Files.Read.All
 
 # View configured permissions
-a365 config init --custom-blueprint-permissions
+a365 config permissions
 
 # Clear all custom permissions
-a365 config init --custom-blueprint-permissions --reset
+a365 config permissions --reset
 ```
 
 **Minimum required configuration:**
@@ -145,8 +144,7 @@ If your agent needs additional API permissions beyond the standard set (e.g., Pr
 
 ```bash
 # Add custom permissions to config
-a365 config init --custom-blueprint-permissions \
-  --resourceAppId 00000003-0000-0000-c000-000000000000 \
+a365 config permissions --resource-app-id 00000003-0000-0000-c000-000000000000 \
   --scopes Presence.ReadWrite,Files.Read.All
 
 # Then run setup (custom permissions applied automatically)

src/Tests/Microsoft.Agents.A365.DevTools.Cli.Tests/Services/ConfigurationWizardServicePermissionsTests.cs

@@ -15,6 +15,7 @@ namespace Microsoft.Agents.A365.DevTools.Cli.Tests.Services;
 /// wizard step that collects optional custom blueprint permissions.
 /// Uses reflection (same pattern as ConfigurationWizardServiceWebAppNameTests) to invoke the private method.
 /// </summary>
+[Collection("ConfigTests")]
 public class ConfigurationWizardServicePermissionsTests
 {
     private static readonly string ValidGuid = "00000003-0000-0000-c000-000000000000";