Cubeviz movie the sequel: The GIF that keeps giving

[Jdaviz-Triage-Bot]

Reporter: pllim

User expressed interest to be able to write movie out as GIF instead of MPEG-4. This would need yet another optional dependency like imageio . Also developer needs to check to see if FPS still makes sense in the GIF format and how to handle transparent layers (if applicable).

Bonus: True Baby Shark GIF to GIF roundtrip.

This is a follow-up of https://github.com/spacetelescope/jdaviz/pull/2264

🐱

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