Rewrite fetch_pokeapi.py to read from local submodule instead of PokeAPI

Replace all pokebase API calls with local JSON file reads from the
PokeAPI/api-data git submodule, removing the network dependency and
pokebase package. The script now runs with stdlib Python only.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.beans/nuzlocke-tracker-tqoq--rewrite-fetch-pokeapipy-to-use-local-submodule-dat.md

@@ -0,0 +1,11 @@
+---
+# nuzlocke-tracker-tqoq
+title: Rewrite fetch_pokeapi.py to use local submodule data
+status: completed
+type: task
+priority: normal
+created_at: 2026-02-05T18:14:38Z
+updated_at: 2026-02-05T18:16:34Z
+---
+
+Replace all pokebase API calls with local JSON file reads from the PokeAPI/api-data git submodule. Remove pokebase dependency from pyproject.toml.