[Feature Request] Remove duplicates as automatic task

[NickeManarin]

Discussed in https://github.com/NickeManarin/ScreenToGif/discussions/1001

^{Originally posted by ninmonkey November 2, 2021} I can't seem to find much about tasks. I found some options in the preferences dialog. Can I make it run remove duplicates, sum time, at 100% similarity? I record a lot of command line gifs, so I frequently use that transform.

If it it's possible/easier with the command line, that could work