feat(global) several major updates:

- delete page `tag`, `archive`
- add page `friends`
- implement page `about` *partially*

frontend/app/blog/post/[id]/ButtonGoBack.tsx

@@ -0,0 +1,21 @@
+'use client';
+
+import React from 'react';
+import { useRouter } from 'next/navigation';
+import { Button } from '@nextui-org/react';
+import { IoArrowBackOutline } from 'react-icons/io5';
+
+const ButtonGoBack = () => {
+    const router = useRouter();
+
+    return (
+        <Button
+            startContent={ <IoArrowBackOutline /> }
+            variant={ 'light' }
+            onClick={ () => router.back() }
+        >
+            { 'Back' }
+        </Button>
+    );
+};
+export default ButtonGoBack;