Move backups into the settings pages

Admin settings gains a super-admin Backups page at
/admin/settings/backups, with restore nested at .../backups/restore.
Both use SettingsShell and SettingsGroup like the other settings sub
pages instead of the retired admin hero.

src/dict/settings-pages-dict.ts

@@ -2,6 +2,7 @@ import {
     Bell,
     Bot,
     CpuAi,
+    DatabaseBackup,
     KeyRound,
     Layers,
     Monitor,
@@ -32,6 +33,8 @@ export type SettingsPage = {
 };
 
 export const SettingsComputersPath = "/admin/settings/computers";
+export const SettingsBackupsPath = "/admin/settings/backups";
+export const SettingsBackupsRestorePath = `${SettingsBackupsPath}/restore`;
 
 /**
  * The `/admin/settings/*` sub pages, listed in the rail on every settings
@@ -77,6 +80,12 @@ export const SettingsPages: SettingsPage[] = [
         Icon: Variable,
         super_admin_only: true,
     },
+    {
+        title: "Backups",
+        url: SettingsBackupsPath,
+        Icon: DatabaseBackup,
+        super_admin_only: true,
+    },
 ];
 
 export const SettingsDefaultPath = "/admin/settings/general";