Add generic layout of listing cards

This should eventually by ported to other interfaces for consistency.

ts/store/resource.ts

@@ -92,6 +92,9 @@ function createResourceStore<dto, full extends uriHaver>(
 			throw err;
 		}
 	}
+	function loadingAll(): boolean {
+		return !!_resourceFetchAll.value;
+	}
 	function loadingURI(uri: string): boolean {
 		return !!_resourceFetchByURI.value.get(uri);
 	}
@@ -105,6 +108,7 @@ function createResourceStore<dto, full extends uriHaver>(
 		fetchAll,
 		fetchByID,
 		fetchByURI,
+		loadingAll,
 		loadingURI,
 	};
 }