Add Python tool scaffold for PokeDB data import

Set up tools/import-pokedb/ with CLI, JSON loader, and output models.
Replaces the Go/PokeAPI approach with local PokeDB.org JSON processing.

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

tools/import-pokedb/pyproject.toml

@@ -0,0 +1,9 @@
+[project]
+name = "import-pokedb"
+version = "0.1.0"
+description = "Convert PokeDB.org JSON data exports into nuzlocke-tracker seed format"
+requires-python = ">=3.12"
+dependencies = []
+
+[project.scripts]
+import-pokedb = "import_pokedb.__main__:main"