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

This reverts commit c92f4a5edd.

frontend/node_modules/yaml/dist/parse/line-counter.d.ts

@@ -0,0 +1,22 @@
+/**
+ * Tracks newlines during parsing in order to provide an efficient API for
+ * determining the one-indexed `{ line, col }` position for any offset
+ * within the input.
+ */
+export declare class LineCounter {
+    lineStarts: number[];
+    /**
+     * Should be called in ascending order. Otherwise, call
+     * `lineCounter.lineStarts.sort()` before calling `linePos()`.
+     */
+    addNewLine: (offset: number) => number;
+    /**
+     * Performs a binary search and returns the 1-indexed { line, col }
+     * position of `offset`. If `line === 0`, `addNewLine` has never been
+     * called or `offset` is before the first known newline.
+     */
+    linePos: (offset: number) => {
+        line: number;
+        col: number;
+    };
+}