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/app/loading.tsx

@@ -1,15 +1,3 @@
-import { cn } from "../lib/utils";
-
-interface IProps {
-  className?: string | null;
-}
-
-const Loading = ({ className = "w-svw h-svh" }: IProps) => {
-  return (
-    <div className={cn("flex items-center justify-center", className)}>
-      <div className="h-5 w-5 animate-spin rounded-full border-b-2 border-primary"></div>
-    </div>
-  );
-};
+import Loading from "@/components/loading";
 
 export default Loading;