feat: add admin-exclusive share-management page (#461)

* testing with all_shares

* share table

* share table

* change icon on admin page

* add share size to list

---------

Co-authored-by: Elias Schneider <login@eliasschneider.com>

frontend/src/pages/admin/index.tsx

@@ -10,7 +10,7 @@ import {
 } from "@mantine/core";
 import Link from "next/link";
 import { useEffect, useState } from "react";
-import { TbRefresh, TbSettings, TbUsers } from "react-icons/tb";
+import { TbLink, TbRefresh, TbSettings, TbUsers } from "react-icons/tb";
 import { FormattedMessage } from "react-intl";
 import Meta from "../../components/Meta";
 import useTranslate from "../../hooks/useTranslate.hook";
@@ -41,6 +41,11 @@ const Admin = () => {
       icon: TbUsers,
       route: "/admin/users",
     },
+    {
+      title: t("admin.button.shares"),
+      icon: TbLink,
+      route: "/admin/shares",
+    },
     {
       title: t("admin.button.config"),
       icon: TbSettings,