Develop - Connection mode picker and major connection improvements

[sameerasw]

This pull request introduces a new "Connection Mode" setting to the app, allowing users to select between Network, Dynamic, and Nearby modes for device connectivity. The changes unify and modernize the connection logic, update the UI to reflect the new setting, and improve BLE and discovery management for better reliability and clarity.

Connection Mode Setting and Logic:

• Added AppConnectionMode enum to AppState, supporting .network, .dynamic, and .nearby modes, with localized display names. The selected mode is persisted in UserDefaults, and legacy BLE settings are migrated for backward compatibility. Changing the mode updates BLE enablement and discovery behavior accordingly. [1] [2] [3]

UI Updates:

• Updated the Settings and Connection Status UI to use a segmented picker for selecting the connection mode, with localized labels and descriptions for each option. The previous BLE toggle is replaced by the new picker, and descriptive text is shown for the selected mode. [1] [2] [3] [4] [5]

Discovery and BLE Improvements:

• The DiscoveryManager now respects the selected connection mode, skipping discovery if set to Nearby-only. BLECentralManager improvements include preventing duplicate service requests, ensuring proper cleanup on disconnect, and fixing notification subscription logic. [1] [2] [3] [4] [5] [6] [7] [8]

Localization:

• Added new localization strings for the connection mode setting and its descriptions.

Code Cleanup:

• Removed redundant code related to sending the device name over BLE in WebSocketServer+Outgoing.swift.