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

This reverts commit c92f4a5edd.

frontend/node_modules/preact/compat/scheduler.mjs

@@ -0,0 +1,23 @@
+/* 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);