Adds ability to fly from the PokeNav Region Map

[khbsd]

Lets the player press 'R' over locations they have visited to fly to them from the PokeNav Region Map.

Description

• changed RegionMap struct to typedef RegionMap struct with the name RegionMap to allow more flexible use in other files
• refactored some logic from CB_ExitFlyMap() to allow setting the fly destination correctly from other files
• added OW_FLAG_USE_FLY_FROM_POKENAV to allow this feature to be disabled
• added SYS_USE_POKENAV_FLY as a system flag to allow disabling the Show Mon animation when flying from the PokeNav
• added new Looped Task in pokenav_region_map.c to handle flying
• added new function UpdateRegionMapHelpBarText() so the HelpBarText can be easily synced with cursor movement and loading the map from the menu
• added new inputs to both ProcessRegionMapInput_* functions
• added new zoomed in and out text strings with the R button and the text 'FLY' for when the cursor is over a flyable location in the region map
• adjusted some #includes and changed some static functions to non-static so they could be declared in the header files
• uhhhhh probs more but i forgor

Feature(s) this PR does NOT handle:

Adding other interactions in the overworld to handle other HM moves, this is specifically for Fly

Discord contact info

@khbsd