Add macro/enum support

[Grossley]

Add macro and enum support in the compiler.
Automatically decompile macros in <= bytecode 14 games.
Autogenerate macros and enums in situations where they are clearly used and where no other situation makes sense (num << 0).
Add ability to save and load custom defined macros and enums from disk for a given game/data file. Would be easiest to integrate this into the profile mode system.

[colinator27]

Enum support will be coming along with the Underanalyzer merge, but no macro support just yet (although it shouldn't be too terrible to try)

[colinator27]

Enum and macros are both supported in #2056, although no implementation for a game as a whole yet.