Abandon ASM codebase in favour of C-decomp

[Miepee]

Requires decomp to be done/in a usable state first

[biosp4rk]

A few thoughts:

• Decomp probably won't be usable (ie shiftable) for at least 1-2 years
• A lot of the asm can probably be converted 1-1 with C, but some things should probably be rewritten. We might be able to reuse some of what's in the zm rando decomp, especially if it lets us reuse parts of the zm patcher/schema
• Most of the bugs here will probably have fixes: https://github.com/metroidret/mf/blob/main/docs/bugs_and_glitches.md
• As long as the decomp has support for building debug and other regions, we get those for free
  • It may make sense to use US as a base (for helpful glitches), include language select from EU (extended to include Japanese?), and include difficulty options and extra endings from JP