feat: improve app theming code and add Material You (#58)

lib/ui/theme/dynamic_theme_builder.dart

@@ -0,0 +1,58 @@
+import 'package:dynamic_color/dynamic_color.dart';
+import 'package:dynamic_themes/dynamic_themes.dart';
+import 'package:flutter/material.dart';
+import 'package:google_fonts/google_fonts.dart';
+import 'package:revanced_manager/app/app.router.dart';
+import 'package:revanced_manager/theme.dart';
+import 'package:stacked_services/stacked_services.dart';
+
+class DynamicThemeBuilder extends StatelessWidget {
+  final String title;
+  final Widget home;
+  final Iterable<LocalizationsDelegate> localizationsDelegates;
+
+  const DynamicThemeBuilder({
+    Key? key,
+    required this.title,
+    required this.home,
+    required this.localizationsDelegates,
+  }) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return DynamicColorBuilder(
+      builder: (lightColorScheme, darkColorScheme) {
+        ThemeData lightDynamicTheme = ThemeData(
+          useMaterial3: true,
+          colorScheme: lightColorScheme?.harmonized(),
+          textTheme: GoogleFonts.robotoTextTheme(ThemeData.light().textTheme),
+        );
+        ThemeData darkDynamicTheme = ThemeData(
+          useMaterial3: true,
+          colorScheme: darkColorScheme?.harmonized(),
+          textTheme: GoogleFonts.robotoTextTheme(ThemeData.dark().textTheme),
+        );
+        return DynamicTheme(
+          themeCollection: ThemeCollection(
+            themes: {
+              0: lightCustomTheme,
+              1: darkCustomTheme,
+              2: lightDynamicTheme,
+              3: darkDynamicTheme,
+            },
+            fallbackTheme: lightCustomTheme,
+          ),
+          builder: (context, theme) => MaterialApp(
+            debugShowCheckedModeBanner: false,
+            title: title,
+            navigatorKey: StackedService.navigatorKey,
+            onGenerateRoute: StackedRouter().onGenerateRoute,
+            theme: theme,
+            home: home,
+            localizationsDelegates: localizationsDelegates,
+          ),
+        );
+      },
+    );
+  }
+}