Create a class which defines a quasiprobability decomposition

[caleb-johnson]

Quasiprobabilistic sampling for quantum circuits was first introduced as a technique for error mitigation and has since been used to design techniques for cutting quantum circuits in both the space (gate cuts) and time (wire cuts).

Resolution of this issue should include a class or data structure defining one decomposition with a given circuit (i.e. one gate cut or one wire cut).