introduce biome instead of prettier and eslint.

src/common/Loading.tsx

@@ -1,5 +1,5 @@
+// biome-ignore lint/style/useImportType: React is required in scope for the old JSX transform.
 import React from 'react';
-
 import DynamicPortal from './DynamicPortal';
 
 import styles from './Loading.module.css';