Add setting to disable v2 language server

[mark-wiemer]

Works on #493

Should simplify experience for those that are still using AHK v1

[ewerybody]

Hey @mark-wiemer just a dumb question: You put the english original into the chinese translation file? Is that a VS Code thing that handles translation that way? I guess it just loads exactly 1 file into memory as a key-value dictionary and does not auto fill up missing keys with english? (I'm currently working on translation for our games 😄)

[mark-wiemer]

@ewerybody it's a placeholder to make sure I don't forget to add the Chinese translation later :) otherwise without the file in the PR I might forget to put anything there!