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

This reverts commit c92f4a5edd.

frontend/node_modules/react-dnd-html5-backend/src/BrowserDetector.ts

@@ -0,0 +1,13 @@
+import { memoize } from './utils/js_utils.js'
+
+declare global {
+	interface Window extends HTMLElement {
+		safari: any
+	}
+}
+
+export type Predicate = () => boolean
+export const isFirefox: Predicate = memoize(() =>
+	/firefox/i.test(navigator.userAgent),
+)
+export const isSafari: Predicate = memoize(() => Boolean(window.safari))