Add bloc provider

lib/app.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:thesis_shop/bloc_provider.dart';
 import 'package:thesis_shop/route_key.dart';
 import 'package:thesis_shop/screens/cart/cart_screen.dart';
 import 'package:thesis_shop/screens/product_list/product_list_screen.dart';
@@ -12,18 +13,22 @@ class ThesisShopApp extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return MaterialApp(
-      title: 'Thesis Shop',
-      theme: ThemeData(primarySwatch: Colors.red),
-      darkTheme: ThemeData(
-        primarySwatch: Colors.red,
-        brightness: Brightness.dark,
+    final blocProvider = BlocProvider();
+    return AppState(
+      blocs: blocProvider,
+      child: MaterialApp(
+        title: 'Thesis Shop',
+        theme: ThemeData(primarySwatch: Colors.red),
+        darkTheme: ThemeData(
+          primarySwatch: Colors.red,
+          brightness: Brightness.dark,
+        ),
+        routes: {
+          RouteKey.products: (context) => const ProductListScreen(),
+          RouteKey.cart: (context) => const CartScreen(),
+        }.mapKeys((key) => key.name),
+        initialRoute: 'products',
       ),
-      routes: {
-        RouteKey.products: (context) => const ProductListScreen(),
-        RouteKey.cart: (context) => const CartScreen(),
-      }.mapKeys((key) => key.name),
-      initialRoute: 'products',
     );
   }
 }

lib/bloc_provider.dart

@@ -0,0 +1,26 @@
+import 'package:flutter/material.dart';
+
+class BlocProvider {
+  // TODO TBD
+}
+
+class AppState extends InheritedWidget {
+  final BlocProvider blocs;
+  const AppState({
+    Key? key,
+    required this.blocs,
+    required Widget child,
+  }) : super(key: key, child: child);
+
+  static AppState of(BuildContext context) {
+    final AppState? result =
+        context.dependOnInheritedWidgetOfExactType<AppState>();
+    assert(result != null, 'No AppState found in context');
+    return result!;
+  }
+
+  @override
+  bool updateShouldNotify(AppState oldWidget) {
+    return true;
+  }
+}