[Feature] Support csharp-ls

[AdeAttwood]

Add support for csharp-ls in zed for csharp files. I have made a working implementation in my fork AdeAttwood@71e90fe.

I have piggybacked off the abstraction done in the Roslyn LSP following the same pattern to add the new language server.

• Add Support for Roslyn LSP (Csharp Language Server) #11

I have disabled omnisharp in my settings however, I'm not sure if this is needed.

"languages": {
  "CSharp": {
    "language_servers": ["csharp-ls", "!omnisharp"]
  }
}

The main questions for me are:

Is this something you would like to accept?

Is not installing the lsp OK?

All the other LSP's seem to have an install / update process. I did find some, like the gRPC one, that error like this one with a message to install the LSP. I am new to zed and could not see a way to run commands to get the LSP installed. If this is something you want, a nudge in the right direction would be helpful.

If this is a change you want when do you want a PR

I have held off for now because this builds on top of #11, I have only made one commit and diff looks out of scope. Let me know, happy to make a PR whenenver.

[MrSubidubi]

Thanks for working on this!

Is this something you would like to accept?

We definitely would be!

Is this something you would like to accept?

Totally fine, although we'd appreciate it being added. But totally fine to add it later and not in the intial version.