interop with cirq

[Roger-luo]

I think given most of us are using cirq here and there, we should start with taking cirq circuit as an input of the compiler directly. This would allow users from cirq passing their circuit program to bloqade. I don't have a concrete proposal on what the interface gonna look like, here are a few possible options:

• similar to QASM2, we provide a bloqade.cirq.load_circuit(Circuit) function to convert a cirq.Circuit into Method
• proposed by @weinbe58 treat cirq circuit as an operator.