Changed serial functions from synchronous to asynchronous.
Added error handling for GET requests and WiFi Dev Board connections.
Updated the WiFi Dev Board firmware (FlipperHTTP) to trigger three quick green LED blinks when the board is first connected, a solid green LED when the board receives a serial command, and a solid green LED while the board is processing.
Added auto-connect and auto-disconnect for WiFi when a user enters or leaves the app.
