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

This reverts commit c92f4a5edd.

frontend/node_modules/preact/compat/scheduler.js

@@ -0,0 +1,15 @@
+// see scheduler.mjs
+
+function unstable_runWithPriority(priority, callback) {
+	return callback();
+}
+
+module.exports = {
+	unstable_ImmediatePriority: 1,
+	unstable_UserBlockingPriority: 2,
+	unstable_NormalPriority: 3,
+	unstable_LowPriority: 4,
+	unstable_IdlePriority: 5,
+	unstable_runWithPriority,
+	unstable_now: performance.now.bind(performance)
+};