Bump NuGetizer from 1.2.4 to 1.4.6

Simplify dotnet install versions lookup step

Allow specifying required dotnet versions in a file

Address build warnings

Remove unnecessary upstream file

⬆️ Bump files with dotnet-file sync

Drop obsolete .NET6 from tests

Bump dependencies

Minor enhancement to avoid null exceptions

Fix formatting warnings

⬆️ Bump files with dotnet-file sync

When get proxy of classes use seperate ProxyGenerator for each namespace for performance improvement

Updated IVerifies.Verifiable method documentation code example

⬆️ Bump files with dotnet-file sync

Update dotnet-file.yml