Define special encounter data (starters, gifts, fossils) in a new
special_encounters module and merge them into route seed JSON during
generation. Add new route locations to ROUTE_ORDER for cities that
previously had no wild encounters (Saffron City, Pewter City, etc.).
Show colored method badges in the EncounterModal UI for special
encounter types.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
