Initial commit: spec, Claude Code setup, and project docs

Design spec for the bggpipe shelf-to-BGG pipeline, CLAUDE.md and
bgg-api skill capturing BGG API constraints, ruff format-on-edit
hook, README, LICENSE, and .gitignore.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,23 @@
+# Secrets & credential-adjacent state
+.env
+*.storage_state.json
+playwright/.auth/
+storage_state.json
+
+# Local inputs & cache (CSV/JSON artifacts in data/ ARE committed)
+photos/
+data/bgg_cache/
+
+# Python
+__pycache__/
+*.pyc
+.venv/
+.pytest_cache/
+.ruff_cache/
+
+# Personal Claude Code files
+CLAUDE.local.md
+.claude/settings.local.json
+
+# macOS
+.DS_Store