feat: adiciona menu Desenvolvedor as configuracoes, nova modal Sobre e icones da marca TatuChat

- Submenu Desenvolvedor em Configuracoes (Sobre o servidor, Registros, Variaveis e ambiente)
- Modal Sobre maior com logo, descricao com link e rodape (codigo-fonte, licenca, fechar)
- Descricao legivel no tema dark
- Drawer com a logo do projeto e links de support/formulario atualizados
- flutter_launcher_icons: regenera icones Android (mipmap + adaptive), Web, iOS, macOS, Windows

lib/pages/chat_list/sidebar.dart

@@ -11,7 +11,6 @@ import 'package:tatchat/l10n/l10n.dart';
 import 'package:tatchat/utils/tatu_share.dart';
 import 'package:tatchat/widgets/avatar.dart';
 import 'package:tatchat/widgets/matrix.dart';
-import 'package:url_launcher/url_launcher_string.dart';
 
 import 'chat_list.dart';
 
@@ -41,10 +40,10 @@ class Sidebar extends StatelessWidget {
                 ),
                 child: Row(
                   children: [
-                    Icon(
-                      Icons.chat_bubble_outline,
-                      size: 22,
-                      color: theme.colorScheme.primary,
+                    Image.asset(
+                      './assets/logo/mini/logo_mini.png',
+                      width: 28,
+                      height: 28,
                     ),
                     const SizedBox(width: 10),
                     Text(
@@ -115,14 +114,6 @@ class _AccountSection extends StatelessWidget {
           label: L10n.of(context).settings,
           onTap: () => context.go('/rooms/settings'),
         ),
-        _ActionTile(
-          icon: Icons.favorite,
-          iconColor: Colors.red,
-          label: L10n.of(context).supportFluffyChat,
-          onTap: () => launchUrlString(
-            'https://ko-fi.com/post/How-can-I-support-FluffyChat-J2G325WE6I',
-          ),
-        ),
         const Divider(),
         for (final bundle in bundles.keys) ...[
           if (bundles[bundle]!.length != 1 ||