Feature/handle ble manager error cases

[SOGAPPS]

Update sendMessageCompletion to handle other BLEManagerError case with human-readable message

• Return to original main barch code - using error
• CHANGE: Make "OBDServiceError" enum public, so Client can use it to extract human-readable message

[SOGAPPS]

Let the UI Section (SwiftOBD2App) handle error message UI.
Reason: Reduce "SwiftOBD2" code complexity & over dependency

Here's an example of how you can use this in "SwiftOBD2App":

1. Create a shared error handler class or struct:

class BLEErrorHandler {
    static func handle(error: Error) -> String {
        if let obdError = error as? OBDServiceError {
            // Handle specific cases of OBDServiceError
            switch obdError {
            case .noAdapterFound:
                return "No adapter found."
            case .notConnectedToVehicle:
                return "Not connected to the vehicle."
            case .adapterConnectionFailed(let underlyingError):
                return "Adapter connection failed with error: \(underlyingError)"
            case .scanFailed(let underlyingError):
                return "Scan failed with error: \(underlyingError)"
            case .clearFailed(let underlyingError):
                return "Clear failed with error: \(underlyingError)"
            case .commandFailed(let command, let error):
                return "Command '\(command)' failed with error: \(error)"
            }
        } else {
            // Handle other types of errors
            return "Error: \(error.localizedDescription)"
        }
    }
}

2. Use the handle function from ErrorHandler wherever you need to handle errors:
// Example usage in a view:
statusMessage = ErrorHandler.handle(error: error)

[kkonteh97]

I'll add that when I do some much needed refactoring.