Bump version to 0.25.0

## [0.25.0] - 2025-07-11

- Migrate from `Paket` to `Directory.Packages.props` #722 [@xperiandri]
- Migrate to .NET `9.0.201` and FCS `43.9.201` #722 [@xperiandri]
- Write test logs to test context output #722 [@xperiandri]
- Use string interpolation instead of `+` concatenation #724 [@xperiandri]
- Run tests in parallel #728 [@xperiandri]
- Remove `NoPartialFunctions` compiler workaround (#698) [@webwarrior-ws]
- Add `SLNX` and `SLNF` format support and migrate to SLNX solution #723 [@xperiandri]
  Remove `Ionide.ProjInfo.Sln` NuGet package dependency
- Remove `Newtonsoft.Json` NuGet dependency #725 [@xperiandri]
- Add missing rule checks for FL0079-FL0081 #713 [@BennieCopeland]
- Modify `.gitignore` to the Visual Studio standard one #735 [@xperiandri]
- Add basic Copilot instructions and GitHub MCP #726 [@xperiandri]
- Migrate `Fornax` to `0.16.0-beta002` and `FSharp.Formatting` to `20.0.1` #736 [@xperiandri, @Numpsy]
- Update the build instructions to use `dotnet fsi` instead of `fake-cli` #734 [@Numpsy]

Author: xperiandri