Add Motus.Testing.MSTest.v4 for MSTest 4 - #38

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, actions/setup-dotnet@v4, actions/upload-artifact@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Enable analyzer release tracking for the analyzer project containing rule 'MOTUS002' (https://github.com/dotnet/roslyn-analyzers/blob/main/src/Microsoft.CodeAnalysis.Analyzers/ReleaseTrackingAnalyzers.Help.md)

Enable analyzer release tracking for the analyzer project containing rule 'MOTUS001' (https://github.com/dotnet/roslyn-analyzers/blob/main/src/Microsoft.CodeAnalysis.Analyzers/ReleaseTrackingAnalyzers.Help.md)

Possible null reference argument for parameter 'other' in 'bool PluginTypeInfo.Equals(PluginTypeInfo other)'.

Enable analyzer release tracking for the analyzer project containing rule 'MOT002' (https://github.com/dotnet/roslyn-analyzers/blob/main/src/Microsoft.CodeAnalysis.Analyzers/ReleaseTrackingAnalyzers.Help.md)

Enable analyzer release tracking for the analyzer project containing rule 'MOT005' (https://github.com/dotnet/roslyn-analyzers/blob/main/src/Microsoft.CodeAnalysis.Analyzers/ReleaseTrackingAnalyzers.Help.md)

Enable analyzer release tracking for the analyzer project containing rule 'MOT001' (https://github.com/dotnet/roslyn-analyzers/blob/main/src/Microsoft.CodeAnalysis.Analyzers/ReleaseTrackingAnalyzers.Help.md)

Enable analyzer release tracking for the analyzer project containing rule 'MOT007' (https://github.com/dotnet/roslyn-analyzers/blob/main/src/Microsoft.CodeAnalysis.Analyzers/ReleaseTrackingAnalyzers.Help.md)

Enable analyzer release tracking for the analyzer project containing rule 'MOT004' (https://github.com/dotnet/roslyn-analyzers/blob/main/src/Microsoft.CodeAnalysis.Analyzers/ReleaseTrackingAnalyzers.Help.md)

Enable analyzer release tracking for the analyzer project containing rule 'MOT003' (https://github.com/dotnet/roslyn-analyzers/blob/main/src/Microsoft.CodeAnalysis.Analyzers/ReleaseTrackingAnalyzers.Help.md)

Enable analyzer release tracking for the analyzer project containing rule 'MOT006' (https://github.com/dotnet/roslyn-analyzers/blob/main/src/Microsoft.CodeAnalysis.Analyzers/ReleaseTrackingAnalyzers.Help.md)