Initial commit - UCXL validator and browser tools

- Added UCXL validator implementation with error codes and response codes
- Created Docker-based development environment
- Implemented frontend browser interface with TypeScript/React
- Added backend validation service in Python
- Created comprehensive UCXL browser specification and validation tools

🤖 Generated with [Claude Code](https://claude.ai/code)

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

inventory.ini

@@ -0,0 +1,5 @@
+[popos]
+192.168.1.27 ansible_user=tony
+192.168.1.72 ansible_user=tony
+192.168.1.113 ansible_user=tony
+192.168.1.132 ansible_user=tony