enhance: metaをSSR HTMLに埋め込む (#13436)

* enhance: `meta`をSSR HTMLに埋め込む

* HTML Metaの有効時間を指定

* １時間

* MetaEntityService

* JSONをPackするように

* ✌️

---------

Co-authored-by: syuilo <4439005+syuilo@users.noreply.github.com>

packages/frontend/src/pages/admin/server-rules.vue

@@ -58,7 +58,7 @@ const save = async () => {
 	await os.apiWithDialog('admin/update-meta', {
 		serverRules: serverRules.value,
 	});
-	fetchInstance();
+	fetchInstance(true);
 };
 
 const remove = (index: number): void => {