Add support for "modified_at" for getting user ratings in the following v3 API endpoints:

• Rated Movies: https://developer.themoviedb.org/reference/account-rated-movies
• Rated TV Shows: https://developer.themoviedb.org/reference/account-rated-tv
• Rated TV Episodes: https://developer.themoviedb.org/reference/account-rated-tv-episodes

Example response:

  "account_rating": {
    "created_at": "2023-05-16T20:01:05.381Z",
    "modified_at": "2023-06-20T20:03:06.321Z"
    "value": 6
  }

OR simply:

  "created_at": "2023-05-16T20:01:05.381Z"
  "modified_at": "2023-06-20T20:03:06.321Z"

I also made a similar thread here requesting added support for "modified_at" date in v4 API endpoints as well as added support for the"Rated TV Episodes" endpoint in v4 API. Either of these two feature requests would be helpful but if both could be implemented that would be ideal.

I'm currently working on a project called TMDB-Trakt-Syncer which syncs user data (including ratings) between TMDB and Trakt. I need a way to be able to get the "modified_at" date so I can implement a feature where the most recent rating is identified and synced across both platforms accordingly.

Relevant GitHub issue: https://github.com/RileyXX/TMDB-Trakt-Syncer/issues/20