Added typedefs: mapsec_t, metloc_t, and variants for MAPSEC and METLOC values. There are some rough edges that could do with smoothing out, but for now, this gets us close to ideal with a ROM that compares equal.
Per feedback, all typedefs to mention the underlying type within the typedef name. The documentation comments reflect and explain the naming convention.
Updated comments to reflect the fact that we're no longer using SET8 for a Pokemon's met locations, in favor of a new macro (added by this PR) that adjusts to match the width of whatever is being set.
* Converted Match Call names and descriptions to COMPOUND_STRINGs
* Moved May/Brendan and Elite Four descriptions into pokenav_match_call_data.c
* Moved Steven, Brendan, and May's Match Call text to pokenav_match_call_data.c
* Cleaned up Steven's Match Call text
* Added PokeNav option text to match_call_gfx
* Moved PokeNav page descriptions to menu_handler_gfx
* Moved help bar texts to pokenav_main_menu.c
* Moved various PokeNav strings out of strings.c and into their relevant files
* Removed unused PokeNav strings
* Moved existing sanitized trainer data functions to include/data.h
* Sanitized encounterMusic_gender
* Sanitized trainer class ID
* Sanitized trainer pic ID
* Sanitized trainer starting status
* Sanitized obtaining Trainer struct
* Sanitized trainer double battle flag
* Sanitized trainer party size
* Sanitized trainer mugshot data
* Sanitized trainer name
* Consolidated Dome Brain trainer data to the rest of the frontier data
* Sanitized trainer items
* Removed accidental test data
* Sanitized trainer party
* Sanitized trainer AI flags
* Final encapsulation bit
