Add cool zs spinning logo

lib/navigation/router.dart

@@ -16,6 +16,7 @@ import 'package:zapstore/screens/search_screen.dart';
 import 'package:zapstore/screens/settings_screen.dart';
 import 'package:zapstore/screens/updates_screen.dart';
 import 'package:zapstore/widgets/error_container.dart';
+import 'package:zapstore/widgets/spinning_logo.dart';
 
 /// Application navigation.
 ///  - Initializes Go Router, dispatches routes
@@ -126,7 +127,7 @@ class ScaffoldWithNestedNavigation extends HookConsumerWidget {
           errorHandler(e, stack);
           return ErrorContainer(exception: e, stack: stack);
         },
-        loading: () => const Center(child: CircularProgressIndicator()),
+        loading: () => Center(child: SpinningLogo()),
       ),
     );
   }

lib/widgets/spinning_logo.dart

@@ -0,0 +1,49 @@
+import 'package:flutter/material.dart';
+
+class SpinningLogo extends StatefulWidget {
+  const SpinningLogo({super.key});
+
+  @override
+  SpinningLogoState createState() => SpinningLogoState();
+}
+
+class SpinningLogoState extends State<SpinningLogo>
+    with TickerProviderStateMixin {
+  late AnimationController _controller;
+
+  @override
+  void initState() {
+    super.initState();
+    _controller = AnimationController(
+      vsync: this,
+      duration: Duration(seconds: 2),
+    )..repeat(); // Repeat the animation indefinitely
+  }
+
+  @override
+  void dispose() {
+    _controller.dispose(); // Dispose of the controller when done
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Center(
+      child: AnimatedBuilder(
+        animation: _controller,
+        builder: (context, child) {
+          return Transform.rotate(
+            angle:
+                _controller.value * 2.0 * 3.14159, // Full rotation in radians
+            child: child,
+          );
+        },
+        child: Image.asset(
+          'assets/images/logo-fg.png',
+          height: 200,
+          width: 200,
+        ), // Adjust size as needed
+      ),
+    );
+  }
+}