Disabling autocompletion in comments

まだ誰も着手していません。

When writing comments in Lua, the autocompletion suggests words while typing. This happens without a delay and after typing the first letter of a word. I found the quickly flashing suggestions very distracting and wanted to disable them.

I assumed that I could change this in the Lua section in the settings, and tried this:

```
"Lua.completion.enable": false,
"Lua.completion.showWord": "Disable",
"Lua.completion.workspaceWord": false,
```

This didn't fix the issue, and I still saw the suggestions.

I opened an issue here: https://github.com/LuaLS/lua-language-server/issues/2988

As noted in a comment on that issue, vscode-lua overrides the `editor.quickSuggestions` setting. This was unexpected to me. It would be helpful if this could be changed or documented.

まず、editor.quickSuggestions を上書きする VSCode 拡張機能の設定動作を確認し、コンテキストとしてリンク先の LuaLS issue #2988 を参照してください。ユーザーが期待どおりにコメントの自動補完を無効化できるようになるか、上書きと利用可能な設定が明確に文書化されれば完了です。

索引モデルが issue の本文から書いたものです。