Make code auto-completion from the plugin optional

[Sebaestschjin]

I use the Lua language server plugin in VS Code (https://github.com/sumneko/lua-language-server) to define the types for the TTS API as well as the game specific API. Thus, the auto-completion/suggestion already comes from the Lua plugin. I'd like an option to not show the suggestion from the TTS plugin as they then show multiple times.