[Feature] Track number of views and most recent view for a video

[dn8sh6HY]

This would allow for sorting by "most recently viewed"

[Caleripo]

Duplicate of #633 I think.

[sleetx]

It would be helpful to sort scenes by most recently viewed. There's already fields for "Created At" and "Updated At"... let's add "Last Viewed At"

There's been some discussion about what qualifies as a "view" for the timestamp and the view counter... does it trigger the instant you open it? If you watch it for 30 seconds, 5 minutes, etc? I think a short delay would be sufficient so it ignores accidental opens.

[AdultSun]

Completed with PR #3055 which includes a "Last Played At" option for sorting.