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

This reverts commit c92f4a5edd.

frontend/node_modules/yaml/dist/stringify/stringifyComment.d.ts

@@ -0,0 +1,10 @@
+/**
+ * Stringifies a comment.
+ *
+ * Empty comment lines are left empty,
+ * lines consisting of a single space are replaced by `#`,
+ * and all other lines are prefixed with a `#`.
+ */
+export declare const stringifyComment: (str: string) => string;
+export declare function indentComment(comment: string, indent: string): string;
+export declare const lineComment: (str: string, indent: string, comment: string) => string;