Add More Warning as Error Checks

A good addition to that is:
```csharp
latest-All
true
```

The issue provides only AnalysisLevel and CodeAnalysisTreatWarningsAsErrors project settings, without naming a file or project. Start by locating the repository's C# project files and checking their existing warning configuration. Done means the requested checks are consistently enabled in the appropriate project files and the solution still builds successfully.

Written by the indexing model from the issue text.