Fixes for HashLink

[NotHyper-474]

Fixes some issues with HashLink: an error when trying to resolve abstracts, and a workaround for HaxeFoundation/hscript#96 by using a macro that creates a wrapper class for Std and Math.

Edit: Now also fixes enum values not being evaluated properly

[NotHyper-474]

Hmm I just realized that in hxcpp if you try to get a value from a enum that doesn't exist it'll just return null, meanwhile my last commit made it so that in HashLink it throws an error. Maybe it should be reverted.

[EliteMasterEric]

Is this fully functional or still in testing?

[NotHyper-474]

I guess it stills needs better parity with HXCPP (which I don't think will ever be 100% achievable)

[NotHyper-474]

I think this is good enough to at least be able to run FNF in HashLink. I don't think there's a way to fix all of the parity issues, so don't expect cross-target compatibility of mods to work.

[EliteMasterEric]

This PR is kind of in limbo since I can't get lime to build anything with hashlink right now 🤷

I'm also not too much of a fan of HashLink anyway so I can't really be bothered to put a lot of effort into this.

[NotHyper-474]

That's understandable. But if you'd like to test it sometime, there's a list of all the necessary changes to run in the PRs listed in FunkinCrew/Funkin#6135, including a fix for the Lime build issue.