feat(e2e): Implement E2E orchestrator functionality

- Added e2e_connect.py to handle E2E requests to the controller.
- Created main.py to manage E2E realization logic based on intent and rules.
- Introduced service_types for L3oWDM and L2VPN slices, including deletion capabilities.
- Developed templates for Optical and IPoWDM services to standardize requests.
- Enhanced main.py and select_way.py to support E2E controller type.
- Updated send_controller.py to route requests to the E2E controller.
- Added E2E namespace in Swagger for API documentation and interaction.
- Modified build_response.py to accommodate E2E-specific response structures.