refactor: Remove dart from folder name

lib/utils/matrix_sdk_extensions/device_extension.dart

@@ -0,0 +1,45 @@
+import 'package:flutter/material.dart';
+
+import 'package:matrix/matrix.dart';
+
+IconData _getIconFromName(String displayname) {
+  final name = displayname.toLowerCase();
+  if ({'android'}.any((s) => name.contains(s))) {
+    return Icons.phone_android_outlined;
+  }
+  if ({'ios', 'ipad', 'iphone', 'ipod'}.any((s) => name.contains(s))) {
+    return Icons.phone_iphone_outlined;
+  }
+  if ({
+    'web',
+    'http://',
+    'https://',
+    'firefox',
+    'chrome',
+    '/_matrix',
+    'safari',
+    'opera',
+  }.any((s) => name.contains(s))) {
+    return Icons.web_outlined;
+  }
+  if ({'desktop', 'windows', 'macos', 'linux', 'ubuntu'}
+      .any((s) => name.contains(s))) {
+    return Icons.desktop_mac_outlined;
+  }
+  return Icons.device_unknown_outlined;
+}
+
+extension DeviceExtension on Device {
+  String get displayname =>
+      (displayName?.isNotEmpty ?? false) ? displayName! : 'Unknown device';
+
+  IconData get icon => _getIconFromName(displayname);
+}
+
+extension DeviceKeysExtension on DeviceKeys {
+  String get displayname => (deviceDisplayName?.isNotEmpty ?? false)
+      ? deviceDisplayName!
+      : 'Unknown device';
+
+  IconData get icon => _getIconFromName(displayname);
+}