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>

.claude/settings.json

@@ -0,0 +1,17 @@
+{
+  "hooks": {
+    "PostToolUse": [
+      {
+        "matcher": "Write|Edit",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "jq -r '.tool_input.file_path // .tool_response.filePath // empty' | { read -r f; case \"$f\" in *.py) uvx ruff format \"$f\" && uvx ruff check --fix \"$f\";; esac; } 2>/dev/null || true",
+            "timeout": 60,
+            "statusMessage": "ruff format + check"
+          }
+        ]
+      }
+    ]
+  }
+}