change reading styles to moved core pkg spinner

apps/app/src/components/LoadingSpinner.tsx

@@ -1,7 +1,5 @@
 import React, { type ComponentPropsWithoutRef } from 'react';
 
-import styles from './LoadingSpinner.module.scss';
-
 export const LoadingSpinner = ({ className = '' }: ComponentPropsWithoutRef<'span'>): JSX.Element => (
-  <span className={`material-symbols-outlined pb-0 ${styles.spinner} ${className}`}>progress_activity</span>
+  <span className={`material-symbols-outlined pb-0 spinner ${className}`}>progress_activity</span>
 );

apps/app/src/styles/style-app.scss

@@ -1,5 +1,6 @@
 @import '@growi/core/scss/flex-expand';
 @import '@growi/core/scss/rotate';
+@import '@growi/core/scss/spinner';
 
 @import 'mixins';