[NET10.0] Annotate converters for nullability 3/n#29314

rmarinho merged 8 commits intodotnet:net10.0dotnet/maui:net10.0from

MartyIX:feature/2025-05-04-Convert-nullability-3-n-NET10MartyIX/maui:feature/2025-05-04-Convert-nullability-3-n-NET10Copy head branch name to clipboard