JIT compiler support

[jabraham17]

three versions of JIT all work for static and dynamic

• method 1: lazy JIT, every time we jump to a new section of code compile, transpile to x86, then do the jump to the native x86 code. save that transpiled x86 code so we don't have to recompile it. this is essentially an optimizing compiler. we can then add heuristics of WHEN to do this. do we do it immediately or wait a couple of times to see if it is hot code?
• method 2: eager JIT, transpile everything, then jump to start and just execute
• method 3: conversion, transpile everything and write out a new executable that will run natively. this isn't really JIT, more like a transpiler.