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

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

@@ -1,22 +0,0 @@
-/**
- * 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;
-    };
-}