Implement Even Realities Bluetooth Connection

[FJiangArthur]

Priority: Medium
Phase: 5
Estimate: 5 story points

Description:
Implement Bluetooth connectivity with Even Realities smart glasses for HUD display integration.

Current Issues:

• No actual Bluetooth communication with glasses
• Glasses connection status is simulated
• Cannot send data to glasses display

Acceptance Criteria:

• Discovers Even Realities glasses via Bluetooth scan
• Establishes stable connection with glasses
• Maintains connection state management
• Handles connection failures and reconnection
• Provides connection status updates to UI

Implementation Location:
lib/services/implementations/even_realities_glasses_service.dart