feat(websockets): Implement real-time task updates

[Zafar7645]

User Story: As a project member, I want to see task updates made by other team members in real-time without needing to refresh the page.

Acceptance Criteria:

• Integrate Socket.IO into the NestJS backend, creating a gateway for real-time events.
• When a task is created, updated (e.g., moved to a new column), or deleted, the backend should emit a WebSocket event to all clients viewing that specific project.
• The Angular frontend should connect to the WebSocket server when a user enters a project view.
• The frontend should listen for task-related events.
• When an event is received, dispatch a corresponding NgRx action to update the store, which will automatically update the UI.