feature: schemas in view definitions

This will add a couple of sweet new features:

[x] infer base views automatically based on schemas
[x] allow using schemas in view definitions to DRY things up
[x] extend views so that they can delegate column selection to a schema automatically (this will be awesome OMG)
[x] extend view attributes info with types so that we can infer dry-structs and do other cool things
[x] make it possible to use inferred schemas with views

rom-rb / rom