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

This reverts commit c92f4a5edd.

frontend/node_modules/eslint/messages/invalid-rule-severity.js

@@ -0,0 +1,13 @@
+"use strict";
+
+const { stringifyValueForError } = require("./shared");
+
+module.exports = function({ ruleId, value }) {
+    return `
+Configuration for rule "${ruleId}" is invalid. Expected severity of "off", 0, "warn", 1, "error", or 2.
+
+You passed '${stringifyValueForError(value, 4)}'.
+
+See https://eslint.org/docs/latest/use/configure/rules#using-configuration-files for configuring rules.
+`.trimStart();
+};