[Feature Request] Add variant that declares itself as a formatter for GLua

[LillyWho]

While there is a plugin for GLint, the dependencies for installing GLint just won't install and require installing a whole new environment. I've already got this working and would prefer to just use this extension for GLua as well, but VSCode doesn't identify it as being capable of formatting GLua, so presumably something inside the extension needs to declare that it would be compatible.