Use skeleton for review image loading (#10040)

* don't show chips and date when image is loading

* add skeleton and change observer threshold

* remove debug

* use skeleton for live view too

* old activity indicator looks better on live

* fix gradients and lazy load with skeleton

* fading effects

web/src/components/ui/skeleton.tsx

@@ -0,0 +1,15 @@
+import { cn } from "@/lib/utils"
+
+function Skeleton({
+  className,
+  ...props
+}: React.HTMLAttributes<HTMLDivElement>) {
+  return (
+    <div
+      className={cn("animate-pulse rounded-md bg-muted", className)}
+      {...props}
+    />
+  )
+}
+
+export { Skeleton }