* add: voice assistant companion example
* feat: add HTTP control support for voice-assistant-companion
- Add HTTPRequestEvent to handle HTTP requests from http_server_python
- Update agent.py to process http_cmd and http_data
- Add HTTP event handling in extension.py for save_memory and message commands
- Configure http_server_python extension in property.json (port 8070)
- Set up connections between http_server_python and main_control
- Add http_server_python dependency in manifest.json
* feat: add /save_memory API endpoint in server
- Add SaveMemoryReq struct for save memory requests
- Implement handlerSaveMemory to send save_memory command to worker
- Register /save_memory POST endpoint
- Enable server-side support for memory saving via HTTP API
* chore: remove kei_vowels_pro model files
Remove unused Live2D model files from voice-assistant-companion
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Co-authored-by: Ubuntu <ubuntu@ip-172-31-30-121.ec2.internal>
Co-authored-by: Ethan Zhang <qianze.zhang@hotmail.com>