* Add remaining levels to build system
* add a particles menu
* Update default-menu.gc
* Update part-tester.gc
* make part tester non-destructive
* Make the "ps2 particles" toggle work!
* Update kmachine.h
* fix test
* fix test
* [decomp] `loader` prelim work + some cleanup
* more things
* more
* even more
* yet even more
* minor fixes
* decompiler fix + use behaviors for two funcs
* last functions
* Create loader_REF.gc
* more work
* change vag tool config format + unrelated farmer and yakow stuff
* update some things
* fix some decomp
* cleanup things i came across + make dgo compileable
* fix consistency test
* update refs
* offline test: skip buggy `external-art-buffer` method
* fix test