Initial commit: Namecheap API library with REST/MCP servers

Features:
- Domain management (check, register, renew, contacts)
- DNS management (nameservers, records)
- Glue records (child nameserver) support
- TLD price tracking with KRW conversion
- FastAPI REST server with OpenAI schema
- MCP server for Claude integration

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.env.example

@@ -0,0 +1,20 @@
+NAMECHEAP_API_USER=your_api_user
+NAMECHEAP_API_KEY=your_api_key
+NAMECHEAP_USERNAME=your_username
+NAMECHEAP_CLIENT_IP=your_whitelisted_ip
+NAMECHEAP_SANDBOX=true
+
+# REST API Server Auth
+API_SERVER_KEY=your_api_server_key
+
+# Registrant Info
+REGISTRANT_ORGANIZATION=
+REGISTRANT_FIRST_NAME=
+REGISTRANT_LAST_NAME=
+REGISTRANT_ADDRESS1=
+REGISTRANT_CITY=
+REGISTRANT_STATE_PROVINCE=
+REGISTRANT_POSTAL_CODE=
+REGISTRANT_COUNTRY=
+REGISTRANT_PHONE=
+REGISTRANT_EMAIL=