feat: add loading overlay to between navigations and to auth form events

src/app/loading.tsx

@@ -0,0 +1,10 @@
+import LoadingOverlay from '@/components/loading/LoadingOverlay'
+import React from 'react'
+
+function Loading() {
+  return (
+    <LoadingOverlay />
+  )
+}
+
+export default Loading