LDR & Ultrasonic Updated

Camera sketch

Adding Ultrasonic ESP8266, Temp/Ph ESP8266

Add user management and registration features

Refactor auth UI and add dropdown menu

Update CORS origins, add python-multipart, add .dockerignore

Add authentication and role-based access control to frontend

User creation

Add token verification endpoint and improve error handling

Add user authentication and role management API

Update .gitignore

Initial commit