* Decompile area_arn/4550D0.c and area_dig/6DE1F0.c.
* Remove covered assembly files for battle/area_arn and battle/area_dig.
* Decompile func_80218808_5B1CB8.
* Address @ethteck's feedback on PR#446, sans the switch on actorType.
* Deduplicate UnkFunc52, and add a switch-based matching decomp.
* Turn ACTOR_TYPE_XXX defines into an ActorType macro.
* Remove erroneously added src/world/common/spiked_goomba.c.
* Decomp jump and most of tidal wave action commands
* More action commands
* stop_leech.c fully decomped.
* flee.c decomped
* cleanup and function name convention fixes
* slight cleanup
* Move ActionCommand enum to enums.h, style changes
* Changed some numbers to decimal
* That one missing newline
Co-authored-by: Ethan Roseman <ethteck@gmail.com>
