LSP init options

[rynoV]

Describe the feature or problem you'd like to solve

Support specifying init options for lsp servers

Proposed solution

Some servers like fsautocomplete need options to be passed in the initialize request before they do anything useful. This is how neovim sets up the fsautocomplete server with initOptions.

I'd like to be able to have config like:

    "fsharp": {
      "command": "fsautocomplete",
      "args": ["--adaptive-lsp-server-enabled"],
      "fileExtensions": {
        ".fs": "fsharp",
        ".fsx": "fsharp"
      },
+      "initOptions": {
+       "AutomaticWorkspaceInit": true
+      }
    }

and have these options passed with the initialize request to the server.

Example prompts or workflows

No response

Additional context

No response