Documentation and plotting recipes for the various AbstractECCSetup

[Krastanov]

In #212 we use subtypes of AbstractECCSetup to define how an error-correcting code will be compiled into a circuit (e.g. to simulate various approaches to fault tolerance). Examples of this are Shor syndrome measurements with or without flag qubits or simply direct non-fault-tolerant syndrome measurements. These all need:

• dedicated documentation page that goes through the different approaches and includes circuit diagrams
• visualization tools (probably with Quantikz.jl) that immediately show what these circuits are
• better string representations in the REPL for these types