Add drawing sharing functionality and localization updates

- Implemented sharing options for drawings, including sharing to a public channel and specific rooms.
- Added confirmation dialogs for deleting drawings and sharing drawings.
- Enhanced the drawing toolbar to display a list of user's drawings with options to share or delete.
- Updated localization files for English, Spanish, French, Croatian, Italian, German, Slovenian, and other languages to include new strings related to drawing sharing and management.
- Introduced syncing of drawing messages with the DrawingProvider to restore missing drawings.
- Improved the drawing minimap preview to display a small preview of drawings in the toolbar.

lib/l10n/app_localizations_de.dart

@@ -1820,4 +1820,38 @@ class AppLocalizationsDe extends AppLocalizations {
   String newDrawingsShared(int count, String plural) {
     return '$count neue Zeichnung(en) geteilt';
   }
+
+  @override
+  String get shareDrawing => 'Zeichnung teilen';
+
+  @override
+  String get shareWithAllNearbyDevices =>
+      'Mit allen Geräten in der Nähe teilen';
+
+  @override
+  String get shareToRoom => 'In Raum teilen';
+
+  @override
+  String get sendToPersistentStorage => 'An persistenten Raum-Speicher senden';
+
+  @override
+  String get deleteDrawingConfirm =>
+      'Möchten Sie diese Zeichnung wirklich löschen?';
+
+  @override
+  String get drawingDeleted => 'Zeichnung gelöscht';
+
+  @override
+  String yourDrawingsCount(int count) {
+    return 'Ihre Zeichnungen ($count)';
+  }
+
+  @override
+  String get shared => 'Geteilt';
+
+  @override
+  String get line => 'Linie';
+
+  @override
+  String get rectangle => 'Rechteck';
 }