Animatable items should get post-animation-delay property

[jkomoros]

Originally captured in #396.

Basically, components should have a post-animation-delay attribute that configures how many ms after we thought we were done with animations before actually firing animation-done. This allows things like a card animating to a central spot for visibility, then waiting for a bit (non-semantically) then animating to another location.

Should attach to the base animatablecomponent logic, part of #714

[jkomoros]

• [ ] update architecture.md
• [ ] update the "client animations" section of TUTORIAL
• [ ] Add a move run in debuganimations to move a card to a central spot (rendered large in the middle of the screen), then to the other location.

[jkomoros]

Note that this is similar to renderer.delayAnimation(), but this can be done entirely via attributes, no need for writing finicky code that's tied to precise move names