feat: Initial Porkbun DNS MCP Light server

- 3 specific tools: ping, list_domains, list_dns_records
- 1 pass-through tool: porkbun_api for full API access
- Safety system with READ/WRITE/INFRA access levels
- Embedded API documentation as MCP resource
- Starlette wrapper with /health endpoint
- Gitea Actions CI workflow for Docker build

.gitignore

@@ -0,0 +1,26 @@
+# Environment
+.env
+
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.egg-info/
+dist/
+build/
+.eggs/
+
+# Virtual environments
+.venv/
+venv/
+ENV/
+
+# IDE
+.idea/
+.vscode/
+*.swp
+*.swo
+
+# OS
+.DS_Store
+Thumbs.db