GM9 Lua: "draw" class

[nika5thgearluffy]

This is a draft PR that adds support for drawing pixels, boxes, and text on Lua scripts.

While Lua scripting has only benefited processing commands on GodMod9, I thought it would be crazy to extend it to have features useful for creating other things such as games and apps.

I may not know the scope of GodMode9's scripting, but I wanted to try something new, so this exists.

So, yep.

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Functions added:

• draw.pixel(screenNumber, x, y, color) = Draws a pixel at a specified point at whatever screen you choose.

• draw.box(screenNumber, x, y, width, height, color) = Draws a filled box at a specified point at whatever screen you choose.

• draw.text(screenNumber, text, x, y, color) = Draws text with the font that's being used at a specified point at whatever screen you choose.

• draw.rgb(red, green, blue) = Creates an RGB color that can be used for any of the draw functions. Use this once in a variable for consistency.

• ui.clear_full() = Clears all screens than just the screen that's being used for scripts.

(Will add more if more is added)