Multiple server completion support

[DanielViberg]

• Working mult server compl
• Removed time measure prop
• Tweaked LspResolver to be server id dependent
• Fixed text complete server dependent
• Reset tests

Purpose: Volar 2 support

Note, should propbably be tested by more people before being merged to main!

Config

{
      "name": "vue-ls",
      "filetype": ["vue"],
      "path": "vue-language-server",
      "args": ["--stdio"],
      "features": {
        "definition": true,
        "rename": true
      },
      "initializationOptions": {
          "typescript": {
              "tsdk": "../node/v20.11.0/lib/node_modules/typescript/lib"
          }
      },
    },
    {
      "name": "ts-ls",
      "filetype": ["typescript", "javascript", "vue"],
      "path": "typescript-language-server",
      "args": ["--stdio"],
      "features": {
        "documentFormatting": false,
        "definition": true,
        "rename": true
      },
      "initializationOptions": {
          "plugins":[
            {
              "name": "@vue/typescript-plugin",
              "location":".../node/v20.11.0/lib/node_modules/@vue/typescript-plugin",
              "languages": ["vue"]
            }
          ]
      }
   }

Status:

• completions
  • auto imports
• diagnostics
• definitions (working in some cases, but not all)
• references

[DanielViberg]

I noticed need for cleanup, will update soon.

[DanielViberg]

vuejs/language-tools#3925 (comment) Volar now does not need tsserver running in parallel. Parking this pr until future need.

[DanielViberg]

The above configuraion now works using https://github.com/DanielViberg/lsp/tree/dev-refactor. Only for completions, diag and rename so far. I have not validated all logic yet.
@maximyurevich

[briancarbone]

I'm surprised rename can done with multiple language servers. I quite liked the solution here which explicitly resolves which completion source should be used given the syntactical context: #496. Ultimately, I think only diagnostics and completions need "layering"; the obvious cases are efm-langserver or @tailwindcss/language-server underneath something else. Are there other LSP features that would benefit from a layered approach?