* move friend area settings to src
* split out playtime into different C file and decomp a few more funcs
* time -> play_time
* fix include
* split out more wonder mail stuff
* unify 203B2C0 and unkDungeon structs. snuck in a decomp func too
* split out more menu screens
* work some more on trade items
* doc a few more things
* add a close nonmatch and decomp nullsub and small func
* rollback struct attempt since it causes nonmatchings
* only one func left in asm
* death to trade_item asm and unify into one C file
* more docing and cleanup
* label main menu and trade items menu global menu struct
* doc itemMode
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