Add support for "modified_at" for getting user ratings in the following v4 API endpoints:

• https://developer.themoviedb.org/v4/reference/account-rated-movies
• https://developer.themoviedb.org/v4/reference/account-rated-tv
• https://developer.themoviedb.org/v4/reference/account-rated-tv-episodes ("Rated TV Episodes" is currently not included in the v4 API. https://developer.themoviedb.org/v4/reference/intro/getting-started)

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"

Add support for "Rated TV Episodes" endpoint in v4 API:

Example endpoint:

https://api.themoviedb.org/4/account/%3C%3Caccount_object_id%3E%3E/tv/episodes/rated

I also made a similar thread here requesting the "modified_at" value to be added as part of the v3 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