fix: use dotnet nuget to push packages

[vbreuss]

This PR modernizes the NuGet package publishing process by replacing the legacy nuget.exe tool with the built-in dotnet nuget command. This change follows best practices recommended in Meziantou's blog for more reliable and streamlined package publishing.

Key changes:

• Replaces nuget push with dotnet nuget push command using updated parameter syntax
• Adds .NET SDK setup to ensure dotnet command availability
• Updates dotnet-stryker tool version to 4.7.0

[Copilot]

Pull Request Overview

This PR modernizes the NuGet package publishing process by replacing the legacy nuget.exe tool with the built-in dotnet nuget command for more reliable package publishing.

• Updates package publishing command from nuget push to dotnet nuget push with modernized parameter syntax
• Adds .NET SDK setup step to ensure dotnet command availability in the workflow
• Updates dotnet-stryker tool to version 4.7.0

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
Pipeline/Build.MutationTests.cs	Updates dotnet-stryker tool version to 4.7.0
.github/workflows/build.yml	Modernizes NuGet publishing by adding .NET SDK setup and replacing nuget.exe with dotnet nuget command

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[github-actions]

Test Results

   10 files  ±0     10 suites  ±0   5s ⏱️ -1s
  484 tests ±0    483 ✅ ±0  1 💤 ±0  0 ❌ ±0 
1 440 runs  ±0  1 439 ✅ ±0  1 💤 ±0  0 ❌ ±0 

Results for commit 37d4b99. ± Comparison against base commit 543ff9e.

[github-actions]

🚀 Benchmark Results

Details

BenchmarkDotNet v0.14.0, Ubuntu 24.04.2 LTS (Noble Numbat)

AMD EPYC 7763, 1 CPU, 4 logical and 2 physical cores

.NET SDK 9.0.304

[Host]     : .NET 8.0.19 (8.0.1925.36514), X64 RyuJIT AVX2

DefaultJob : .NET 8.0.19 (8.0.1925.36514), X64 RyuJIT AVX2

Method	Mean	Error	StdDev	Gen0	Allocated
Content_aweXpect	539.4 ns	5.86 ns	5.48 ns	0.0629	1064 B
SuccessStatusCode_aweXpect	295.3 ns	5.72 ns	5.62 ns	0.0496	832 B

[github-actions]

👽 Mutation Results

aweXpect.Web

Details

File	Score	Killed	Survived	Timeout	No Coverage	Ignored	Compile Errors	Total Detected	Total Undetected	Total Mutants

The final mutation score is NaN%

Coverage Thresholds: high:80 low:60 break:0

[github-actions]

This is addressed in release v1.4.0.