feat(example_full): create example representing the whole plugin functional

example_full/lib/utils/extensions.dart

@@ -0,0 +1,11 @@
+import 'package:nearby_service/nearby_service.dart';
+
+extension ChannalPreviewName on CommunicationChannelState {
+  String get previewName {
+    return switch (this) {
+      CommunicationChannelState.notConnected => 'Not connected',
+      CommunicationChannelState.loading => 'Connecting',
+      CommunicationChannelState.connected => 'Connected',
+    };
+  }
+}

example_full/lib/utils/files_saver.dart

@@ -0,0 +1,27 @@
+import 'dart:io';
+
+import 'package:nearby_service/nearby_service.dart';
+import 'package:path_provider/path_provider.dart';
+
+class FilesSaver {
+  FilesSaver._();
+
+  static Future<List<NearbyFileInfo>> savePack(
+      ReceivedNearbyFilesPack pack) async {
+    final files = <NearbyFileInfo>[];
+    final directory = Platform.isAndroid
+        ? Directory('storage/emulated/0/Download')
+        : await getApplicationDocumentsDirectory();
+
+    for (final nearbyFile in pack.files) {
+      final newFile = await File(nearbyFile.path).copy(
+        '${directory.path}/${DateTime.now().microsecondsSinceEpoch}.${nearbyFile.extension}',
+      );
+      if (!await newFile.exists()) {
+        await newFile.create();
+      }
+      files.add(NearbyFileInfo(path: newFile.path));
+    }
+    return files;
+  }
+}