Rethink schema

[Dreamsorcerer]

Before finalising 0.1 release, we need to see if there are improvements to the scheme.

For example, can we get rid of show_actions and just allow creating the entire component dynamically with evaluate(), thus opening up a lot more customisation options.

aiohttp-admin/aiohttp_admin/types.py

Lines 93 to 94 in d8ab462

	# Custom components to add to the actions in the show view.
	show_actions: Sequence[ComponentState]