Update ui docs

crates/ui/docs/todo.md

@@ -1,25 +0,0 @@
-## Documentation priorities:
-
-These are the priorities to get documented, in a rough stack rank order:
-
-- [ ] label
-- [ ] button
-- [ ] icon_button
-- [ ] icon
-- [ ] list
-- [ ] avatar
-- [ ] panel
-- [ ] modal
-- [ ] palette
-- [ ] input
-- [ ] facepile
-- [ ] player
-- [ ] stacks
-- [ ] context menu
-- [ ] input
-- [ ] textarea/multiline input (not built - not an editor)
-- [ ] indicator
-- [ ] public actor
-- [ ] keybinding
-- [ ] tab
-- [ ] toast