feat(wearable_manager): add getSystemDevices method for retrieving known Bluetooth devices

Author: DennisMoschina

lib/open_earable_flutter.dart

@@ -141,6 +141,18 @@ class WearableManager {
     return await BleManager.checkPermissions();
   }
 
+  /// Retrieves Bluetooth devices already known to the operating system.
+  ///
+  /// When [checkAndRequestPermissions] is `true`, the manager first requests
+  /// any missing runtime permissions required for system-device discovery.
+  Future<List<DiscoveredDevice>> getSystemDevices({
+    bool checkAndRequestPermissions = true,
+  }) {
+    return _bleManager.getSystemDevices(
+      checkAndRequestPermissions: checkAndRequestPermissions,
+    );
+  }
+
   /// Adds a wearable factory to the manager.
   /// Wearable factories are used to create wearable instances based on the connected devices.
   /// This allows the manager to support multiple types of wearables.
@@ -169,7 +181,8 @@ class WearableManager {
   }
 
   /// Returns an unmodifiable list of the currently registered wearable factories.
-  List<WearableFactory> get wearableFactories => List.unmodifiable(_wearableFactories);
+  List<WearableFactory> get wearableFactories =>
+      List.unmodifiable(_wearableFactories);
 
   /// Starts scanning for BLE devices.
   /// If `checkAndRequestPermissions` is true, it will check and request the necessary
@@ -292,10 +305,10 @@ class WearableManager {
       ConnectionFailedException _ =>
         'Failed to connect to device "$normalizedDeviceName". Please try again.',
       _ => _normalizeDeviceNameInMessage(
-        message: e.toString(),
-        rawDeviceName: deviceName,
-        normalizedDeviceName: normalizedDeviceName,
-      ),
+          message: e.toString(),
+          rawDeviceName: deviceName,
+          normalizedDeviceName: normalizedDeviceName,
+        ),
     };
   }