Add preliminary implementation for SAM2

[anwai98]

This PR adds preliminary (and super dirty) integration of SAM2 to our annotator.

As the current status:

• 2d works super smooth (all features from our current UI more or less) - and it's ready to test.
• For 3d, I have a few tiny puzzles to join, then it'll be ready. I'll ping @Marei33 once there's more progress here.

Also, keeping @constantinpape and @caroteu in loop!