ScriptHookV (C++) Support

[justalemon]

Requested by @infamoussabre and @E66666666.

The closest to LemonUI/NativeUI available for SHV is @E66666666's MenuBase, but as he mentions:

Cuz https://github.com/E66666666/GTAVMenuBase is horrible.

[I-E-A-I-A-I-O]

Too bad this didn't come in 1.6 😔

[justalemon]

There are a lot of classes that need reimplementation and crazy new functions due to not being available in C++ that ARE available in C#.

To be honest, I wouldn't be surprised if this gets pushed back to 1.8 as C++ in harder and has less "tools" than C#.

[WithLithum]

.NET tools like RPH, SHVDN and CitizenFX.re Managed Core has a lot of object-oriented API that is provided to you already so you don't have to call natives directly. SHV do not have these API so you'll have to call natives for basically anything that is related to game.

[justalemon]

Is not about the missing abstraction provided by the frameworks, but about the basic C# classes that I would need to reimplement from scratch. A couple of examples would be the PointF, SizeF and Color classes that do not have a direct equivalent in C++.

I already have someone helping me with this, so ill get to work on the C++ port next week.