Enhance WebSocket collaboration handler and hub management

[moutonjeremy]

This pull request introduces a new WebSocket-based collaboration backend, enabling real-time Y.js document synchronization. The implementation adds a scalable, room-based relay system for binary collaboration messages, integrates authentication via JWT tokens, and ensures proper resource management. It also updates the dependency injection and server/router setup to support the new collaboration feature.

New Collaboration WebSocket Backend

• Added a new collaboration module with the following components:
  • handler.go: Handles WebSocket upgrades, authenticates users via JWT, and manages WebSocket connections for Y.js rooms.
  • hub.go: Manages the lifecycle of collaboration rooms, including creation, removal, and statistics.
  • room.go: Implements room logic, client management, and message broadcasting between clients (pure relay for binary Y.js messages).

Dependency Injection and Server Initialization

• Registered the new CollaborationHub in the dependency injection container and initialized it during server startup. [1] [2]

HTTP Routing and Middleware Integration

• Registered new WebSocket routes under /ws/collab/:roomId, including JWT authentication middleware and route setup in the HTTP router.
• Updated static file serving logic to skip WebSocket routes, ensuring proper handling of SPA and WebSocket endpoints.

Dependency Updates

• Added new dependencies for WebSocket support and utilities in go.mod (github.com/gofiber/websocket/v2, github.com/fasthttp/websocket, github.com/savsgio/gotils). [1] [2]

Codebase Integration

• Updated imports in relevant files to integrate the new collaboration package. [1] [2] [3]

This change lays the foundation for real-time collaborative editing features using Y.js and WebSockets, with robust authentication and room management.