Paginated admin library & upgrade manifests (#351)

* feat: new page layout + endpoint

* feat: non-parallel mass import

* feat: paginated admin library

* feat: lint and performance improvement

* feat: library filter util

* feat: link frontend features to backend

* fix: lint

* fix: small fixes

* feat: bump torrential

* fix: lint

server/api/v1/admin/library/libraries.get.ts

@@ -0,0 +1,12 @@
+import aclManager from "~/server/internal/acls";
+import libraryManager from "~/server/internal/library";
+
+export default defineEventHandler(async (h3) => {
+  const allowed = await aclManager.allowSystemACL(h3, ["library:read"]);
+  if (!allowed) throw createError({ statusCode: 403 });
+
+  const unimportedGames = await libraryManager.fetchUnimportedGames();
+  const libraries = await libraryManager.fetchLibraries();
+
+  return { unimportedGames, hasLibraries: libraries.length > 0 };
+});