Work list for .NET 8.0.300-based releases

[baronfel]

Details

Stable FCS is out, so here's the checklist for the new version:

• [x] nightly FSAC updated to stable
• [x] nightly FSAC merged to main
• [ ] (bonus) nightly FSAC bumped to use 8.0.400 previews
• [x] ProjInfo updated
  • [x] and updated here
• [x] Analyzer SDK updated
  • [x] and updated here
• [x] Ionide-Analyzers updated
  • [x] and updated here
• [x] new FSAC released
• [x] new Ionide released

Checklist

• [X] I have looked through existing issues to make sure that this feature has not been requested before
• [X] I have provided a descriptive title for this issue
• [X] I am aware that even valid feature requests may be rejected if they do not align with the project's goals
• [X] I or my company would be willing to contribute this feature

[baronfel]

All done!