infer target states from malli schemas

[respatialized]

The signature of a function can be described using malli schemas, which can be used to pin down the target state of a ⟨state,function⟩ tuple by looking for the output schema in the malli registry.

This can be used to refine an ordinary map of schemas to functions into a collection of ⟨state,function,target state⟩ tuples that can be validated for correctness.