Feature Request: Deleting animations from character sprite

[audinowho]

Feature:

• The ability to delete animations from a chara wan, similar to how individual emotions can be deleted from the portrait UI.

Considerations:

• Animations will need to be listed, most likely by index, so that they can be deleted to begin with.
• An extremely barebones implementation could just display the indices in a list, and include the trashcan icon next to them to allow for deletion. This isn't very user-friendly, though.
• Labeling them with animation names poses challenges, as there is currently no data saved in the project for animation names. Not to mention, wan importers don't use the labels at all.
• A better-labeled implementation would need to show the animation in action, like the portraits. IDK how hard it is to make GTK show this though...
• The ability to delete an animation from a WAN from the backend is available as of Chara wan fix skytemple-files#562