Implemented custom skeleton widget

lib/presentation/widgets/app_skeleton.dart

@@ -0,0 +1,51 @@
+import 'package:flutter/material.dart';
+import 'package:skeletonizer/skeletonizer.dart';
+
+class AppSkeleton extends StatefulWidget {
+  final Widget child;
+  final bool enabled;
+  final bool fixLayoutBuilder;
+
+  const AppSkeleton({
+    super.key,
+    required this.child,
+    this.enabled = true,
+    this.fixLayoutBuilder = false,
+  });
+
+  @override
+  State<AppSkeleton> createState() => _AppSkeletonState();
+}
+
+class _AppSkeletonState extends State<AppSkeleton> {
+  @override
+  Widget build(BuildContext context) {
+    return Skeletonizer(
+      effect: PulseEffect(
+        from: Colors.grey[800]!,
+        to: Colors.grey[600]!,
+        duration: const Duration(milliseconds: 800),
+      ),
+      enabled: widget.enabled,
+      enableSwitchAnimation: true,
+      switchAnimationConfig: SwitchAnimationConfig(
+        duration: const Duration(milliseconds: 200),
+        switchInCurve: Curves.linear,
+        switchOutCurve: Curves.linear,
+        transitionBuilder: AnimatedSwitcher.defaultTransitionBuilder,
+        layoutBuilder: !widget.fixLayoutBuilder
+            ? AnimatedSwitcher.defaultLayoutBuilder
+            : (Widget? currentChild, List<Widget> previousChildren) {
+                return Stack(
+                  alignment: Alignment.topCenter,
+                  children: [
+                    ...previousChildren,
+                    if (currentChild != null) currentChild,
+                  ],
+                );
+              },
+      ),
+      child: widget.child,
+    );
+  }
+}