feat(global) several major updates:

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

frontend/app/about/me/page.tsx

@@ -0,0 +1,15 @@
+import React from 'react';
+import MarkdownRenderer from '@/app/public/MarkdownRenderer';
+import { fetchText } from '@/app/fetch';
+
+const Me = async () => {
+    return (
+        <div className={ 'p-5' }>
+            <MarkdownRenderer>
+                { await fetchText('https://raw.githubusercontent.com/lumither/blog-posts/master/about/me.md') }
+            </MarkdownRenderer>
+        </div>
+    );
+};
+
+export default Me;