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

frontend/node_modules/path-exists/index.d.ts

@@ -1,28 +0,0 @@
-declare const pathExists: {
-	/**
-	Check if a path exists.
-
-	@returns Whether the path exists.
-
-	@example
-	```
-	// foo.ts
-	import pathExists = require('path-exists');
-
-	(async () => {
-		console.log(await pathExists('foo.ts'));
-		//=> true
-	})();
-	```
-	*/
-	(path: string): Promise<boolean>;
-
-	/**
-	Synchronously check if a path exists.
-
-	@returns Whether the path exists.
-	*/
-	sync(path: string): boolean;
-};
-
-export = pathExists;