- Add comprehensive tests for all packages (3572 tests, 100% branch coverage)
- Split oversized test files to stay under 500-line limit
- Add per-file ruff ignores for test-appropriate suppressions
- Fix _cache_decks.py to properly convert JSON lists to tuples
- Add session-scoped conftest fixture for logging handler cleanup (Python 3.14)
- Update ruff pre-commit hook to v0.15.2
- Add codespell ignore words for test data
- Add generated output files to .gitignore
Move warsaw_bridges, warsaw_districts, warsaw_landmarks, warsaw_metro,
warsaw_osiedla, warsaw_streets, and car_brand_logos into the existing
python_pkg/anki_decks/ directory alongside the polish_* generators.
Also move preview_all.html into anki_decks/.
Update all import paths, filesystem references in geo_data.py,
docstrings, READMEs, test imports, and .gitignore accordingly.
