Multiple changes:

- Split up UI into several files
- Handle connection state better
- Add images
- Granular rebuilding of state dependent widgets
- Fix usage of alert dialogs
- Add some basic theming
- Add dialog for adding multiple links at once

lib/state/player_state_bloc.dart

@@ -2,8 +2,8 @@ import 'dart:developer' show log;
 
 import 'package:flutter_bloc/flutter_bloc.dart';
 
-import 'player_state.dart';
-import '../api/events.dart';
+import 'package:gergle/api/events.dart';
+import 'package:gergle/state/player_state.dart';
 
 class PlayerStateBloc extends Bloc<Event, PlayerState?> {
   PlayerStateBloc() : super(null) {