`Tracking`: Code Refactorings

> **Note**
> This is a "meta" issue for tracking purposes since GitHub does not support special types of issues.

Code refactorings are code actions that are available but not necessary to be used. In VS, they are represented by screwdrivers.

We should make them easy to create, test, and extend.

Improvements for existing ones:
- [ ] https://github.com/dotnet/fsharp/issues/15563

Ideas for the ones:
- [ ] https://github.com/dotnet/fsharp/issues/2836
- [ ] https://github.com/dotnet/fsharp/issues/15562
- [ ] https://github.com/dotnet/fsharp/issues/15564
- [ ] https://github.com/dotnet/fsharp/issues/15565
- [ ] https://github.com/dotnet/fsharp/issues/15566
- [ ] https://github.com/dotnet/fsharp/issues/15673

Done:
- [x] https://github.com/dotnet/fsharp/issues/10421