Work towards unifying `codes` and `circuits`

[quantumjim]

What is the expected enhancement?

Create at least naive circuits (fault-tolerant against phenomenological noise only) for codes expressed abstractly in codes.

Will be worked in in branch code-circuit-builder.

Some additional ideas are here.

[grace-harper]

328 Hey James does #328 finish this issue for you?

[quantumjim]

It's a step in the right direction, but not closed yet.