Rewrote route_order.json with correct progression ordering for all 15
version groups (Gen 1-9), validated against encounter data files. Added
generate_route_order.py script for reproducible generation and validation.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Moves ~850 lines of inline data from fetch_pokeapi.py into
version_groups.json and route_order.json for easier editing.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
