feat(mobile): html text (#25739)

* feat: html text

* feat: mobile ui showcase (#25827)

* feat: mobile ui showcase

* remove showcase from main app

* update fonts

* update code to be loaded from asset

* fix ci

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Co-authored-by: shenlong-tanwen <139912620+shalong-tanwen@users.noreply.github.com>
# Conflicts:
#	mobile/lib/widgets/common/immich_sliver_app_bar.dart

---------

Co-authored-by: shenlong-tanwen <139912620+shalong-tanwen@users.noreply.github.com>

mobile/packages/ui/showcase/lib/main.dart

@@ -0,0 +1,55 @@
+import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
+import 'package:immich_ui/immich_ui.dart';
+import 'package:showcase/app_theme.dart';
+import 'package:showcase/constants.dart';
+import 'package:showcase/router.dart';
+import 'package:showcase/widgets/example_card.dart';
+
+void main() async {
+  WidgetsFlutterBinding.ensureInitialized();
+  await initializeCodeHighlighter();
+  runApp(const ShowcaseApp());
+}
+
+class ShowcaseApp extends StatefulWidget {
+  const ShowcaseApp({super.key});
+
+  @override
+  State<ShowcaseApp> createState() => _ShowcaseAppState();
+}
+
+class _ShowcaseAppState extends State<ShowcaseApp> {
+  ThemeMode _themeMode = ThemeMode.light;
+  late final GoRouter _router;
+
+  @override
+  void initState() {
+    super.initState();
+    _router = AppRouter.createRouter(_toggleTheme);
+  }
+
+  void _toggleTheme() {
+    setState(() {
+      _themeMode = _themeMode == ThemeMode.light
+          ? ThemeMode.dark
+          : ThemeMode.light;
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp.router(
+      title: appTitle,
+      themeMode: _themeMode,
+      routerConfig: _router,
+      theme: AppTheme.lightTheme,
+      darkTheme: AppTheme.darkTheme,
+      debugShowCheckedModeBanner: false,
+      builder: (context, child) => ImmichThemeProvider(
+        colorScheme: Theme.of(context).colorScheme,
+        child: child!,
+      ),
+    );
+  }
+}