Addon manager plugin support

Explain the feature

The Lua Language Server supports plugins that allow users to write custom Lua scripts that the language server will then run to output a modified file. As of right now, the addon manager will download the plugin.lua file, but it will not tell the server to use it. There should be some easy (and safe) way for users to enable a plugin that they have installed.

Are there any potential drawbacks from adding the feature?

There are some serious security concerns with downloading a script off the internet and running it automatically on the user's computer. While the addons being installed should be reviewed and trusted before being merged into LLS-addons, there is always the chance of something slipping through.

We could ask the user to review the code themselves before approving the request to enable it - but at the end of the day, the safest option will always be to not run code created by other users.

まず、addon manager がダウンロードした plugin.lua ファイルをどのように処理するかを追跡し、runtime.plugin 設定に関する LuaLS のドキュメントを確認します。インストール済みのプラグインを有効にするための承認要件と安全性要件を明確にし、そのうえで、レビューされていないコードを自動的に実行せずに完了を検証する方法を定義します。