mod: add skeleton

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

lib/common/skeleton/fav_pgc_item.dart

@@ -0,0 +1,67 @@
+import 'package:PiliPlus/common/constants.dart';
+import 'package:flutter/material.dart';
+import 'skeleton.dart';
+
+class FavPgcItemSkeleton extends StatelessWidget {
+  const FavPgcItemSkeleton({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    final color = Theme.of(context).colorScheme.onInverseSurface;
+    return Skeleton(
+      child: Padding(
+        padding: const EdgeInsets.symmetric(
+          horizontal: StyleString.safeSpace,
+          vertical: 5,
+        ),
+        child: Row(
+          mainAxisAlignment: MainAxisAlignment.start,
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            AspectRatio(
+              aspectRatio: 3 / 4,
+              child: LayoutBuilder(
+                builder: (context, boxConstraints) {
+                  return Container(
+                    decoration: BoxDecoration(
+                      color: color,
+                      borderRadius: BorderRadius.circular(4),
+                    ),
+                    width: boxConstraints.maxWidth,
+                    height: boxConstraints.maxHeight,
+                  );
+                },
+              ),
+            ),
+            const SizedBox(width: 10),
+            Expanded(
+              child: Column(
+                mainAxisSize: MainAxisSize.min,
+                crossAxisAlignment: CrossAxisAlignment.start,
+                children: [
+                  Container(
+                    width: 175,
+                    height: 12,
+                    color: color,
+                  ),
+                  const SizedBox(height: 10),
+                  Container(
+                    width: 55,
+                    height: 11,
+                    color: color,
+                  ),
+                  const SizedBox(height: 5),
+                  Container(
+                    width: 35,
+                    height: 11,
+                    color: color,
+                  ),
+                ],
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}