In this pull request I've changed a ton of method signatures to reflect the more-narrow types of Species, Move# and Form; additionally, I've narrowed other large collections that stored lists of species / permitted values, and reworked them to be more performant with the latest API spaghetti that PKHeX provides. Roamer met locations, usually in a range of [max-min]<64, can be quickly checked using a bitflag operation on a UInt64. Other collections (like "Is this from Colosseum or XD") were eliminated -- shadow state is not transferred COLO<->XD, so having a Shadow ID or matching the met location from a gift/wild encounter is a sufficient check for "originated in XD".
Make GetG3Species return ushort
Fixes regression caused by 5942a74147
Copying SpeciesID3 instead of Species is fine as it skips the map/unmap step, but it also skips the setting of the HasSpecies flag. So we'll just set it in the individual ConvertToPK3 methods.
