Feature/add function argument parameters

[b0mbie]

Closes #37.

I've tried my best to conform to the argument type descriptions, although, I couldn't fully implement all of them:

• search.AddProvider - return type must be a special table with the fields:
  • string text - Text to "Copy to clipboard"
  • function func - Function to use/spawn the item
  • Panel icon - A panel to add to spawnmenu
  • table words - A table of words? (Even the wiki isn't sure about this one.)
• I may have missed some other functions with callbacks.

I've also looked through the source code of some library functions to see how some callbacks are used to guess the return type.

Some classes/structures (like HTTPRequest) may contain callbacks, but I have only changed the functions.

Due to the above, this may still be an issue in progress.

P.S. At this point, I just want the maintainers of GLua to use a syntax compatible with LuaLS.

[b0mbie]

Alright, I have decided that it wouldn't make sense to do anything for search.AddProvider.
Other functions' table arguments and returns don't get special treatment, so they also shouldn't here.

I think this is all the functions with function arguments. Let me know if I missed any.

[luttje]

Since I'm busy with other projects, if I have to properly review and test your PR we'd risk this not getting picked up by me. On the surface your PR looks good though. For that reason I've decided I'll just merge it without much more testing, so we can get your great contributions into the project faster.

Thank you so much for your contribution!

[luttje]

Things seem to be looking alright. The workflow successfully scraped and your custom overrides have been applied: 3b2193a

Thanks again!