Initial Claude Code user configuration

Includes:
- Global CLAUDE.md instructions
- User settings and permissions (settings.json)
- Plugin configuration
- Skills as submodules: claude-skill-git-gitea, docker-service-architecture

.gitignore

@@ -0,0 +1,24 @@
+# Secrets - NEVER TRACK
+.credentials.json
+
+# Large/private conversation data
+history.jsonl
+
+# Runtime state and caches
+stats-cache.json
+debug/
+telemetry/
+statsig/
+projects/
+todos/
+file-history/
+shell-snapshots/
+session-env/
+ide/
+
+# Plugin caches and state (auto-regenerated)
+plugins/cache/
+plugins/marketplaces/
+plugins/repos/
+plugins/install-counts-cache.json
+plugins/known_marketplaces.json