message: chore(yfa-react): add missing return type to guide
diff: @@ -22,7 +22,7 @@ const { deleteFile, getUri, readFile, writeFile } = useFilesystem();
  Next, create a couple of new functions in `usePhotoGallery`:
  ```typescript
  -const savePicture = async (photo: CameraPhoto, fileName: string) => {
  +const savePicture = async (photo: CameraPhoto, fileName: string): Promise<Photo> => {
  const base64Data = await base64FromPath(photo.webPath!);
  const savedFile = await writeFile({
  path: fileName,
  