refactor(Loading): update Loading component import paths

- Changed import paths for the Loading component from "@/app/loading" to "@/components/loading" across multiple files to maintain consistency and improve modularity.
- Removed the Loading component definition from loading.tsx, simplifying the file structure.

src/components/loading.tsx

@@ -0,0 +1,23 @@
+import { cn } from "@/lib/utils";
+
+interface IProps {
+  className?: string | null;
+}
+/**
+ * Grows with a flex `main` parent so the spinner sits in the middle of the content area.
+ * Guards: `min-h-svh flex-none`. Compact UI: `flex-none min-h-*`.
+ */
+const Loading = ({ className }: IProps) => {
+  return (
+    <div
+      className={cn(
+        "flex min-h-0 w-full min-w-0 flex-1 items-center justify-center",
+        className,
+      )}
+    >
+      <div className="h-5 w-5 animate-spin rounded-full border-b-2 border-primary" />
+    </div>
+  );
+};
+
+export default Loading;