Refactor code structure for improved readability and maintainability

app/login/actions.ts

@@ -39,3 +39,12 @@ export async function signup(formData: FormData) {
   revalidatePath('/', 'layout')
   redirect('/')
 }
+
+export async function signOut() {
+  const supabase = await createClient()
+
+  await supabase.auth.signOut()
+
+  revalidatePath('/', 'layout')
+  redirect('/login')
+}