Ble - Bluetooth LE communication

[sameerasw]

This pull request introduces Bluetooth Low Energy (BLE) support to the macOS app, enabling device connection, communication, and clipboard sync over BLE. The main changes include the addition of BLE management classes, integration of BLE state and actions into the app's state management, and support for chunked data transfer to handle BLE's data size limitations.

Bluetooth Low Energy (BLE) Integration

• Added a new BLECentralManager class to handle BLE scanning, connection, authentication, service/characteristic discovery, chunked data transfer, and connection state management. This class uses Combine publishers to provide connection status updates and device information.
• Introduced BLEConstants to centralize BLE service and characteristic UUIDs, protocol constants, and chunking parameters.
• Implemented BLEChunkUtil for splitting and reassembling large payloads into BLE-compliant chunks, including header parsing utilities.

App State and Clipboard Sync Enhancements

• Integrated BLE state management into AppState, including new published properties (isBLEEnabled, isBLEAutoConnectEnabled), persistence to UserDefaults, BLE connection status handling, and device management for BLE-connected devices. [1] [2] [3] [4] [5]
• Enhanced clipboard sync to also send clipboard updates over BLE in addition to the existing WebSocket mechanism.

UX and Device Handling Improvements

• When disconnecting or logging out, the app now ensures BLE connections are properly terminated and BLE-related state is reset.
• Improved logic for determining if the connection is over the local network or BLE, ensuring accurate status reporting.

Assets

• Added a Bluetooth logo asset for use in the UI, likely to indicate BLE status or features.