Add playback history when exporting the 'Watchlist'

[tzinm]

Currently, when exporting the watchlist to a .csv file, only the date of the last playback is included. The full playback history, which includes all the dates the content was watched, is not exported.

Suggestion:

• Keep the current column (WatchedAt) with the date of the last playback to ensure compatibility with other platforms.
• Add a new column that includes all playback dates, listed in a comma-separated format.

Expected format example:

Title	WatchedAt	Plays	WatchedAtHistory
Example Movie	2025-01-27T23:00:00.000Z	3	2025-01-01T12:05:00.000Z, 2025-01-15T15:30:00.000Z, 2025-01-2723:00:00.000Z

Would it be possible to consider adding this feature?

Thanks for all the great work on this project!