Add yet-another-react-lightbox package and update .gitignore to exclude node_modules

frontend/node_modules/preact/compat/scheduler.mjs

@@ -1,23 +0,0 @@
-/* eslint-disable */
-
-// This file includes experimental React APIs exported from the "scheduler"
-// npm package. Despite being explicitely marked as unstable some libraries
-// already make use of them. This file is not a full replacement for the
-// scheduler package, but includes the necessary shims to make those libraries
-// work with Preact.
-
-export var unstable_ImmediatePriority = 1;
-export var unstable_UserBlockingPriority = 2;
-export var unstable_NormalPriority = 3;
-export var unstable_LowPriority = 4;
-export var unstable_IdlePriority = 5;
-
-/**
- * @param {number} priority
- * @param {() => void} callback
- */
-export function unstable_runWithPriority(priority, callback) {
-	return callback();
-}
-
-export var unstable_now = performance.now.bind(performance);