Implementation of a "Standard" Intermediate Representation (IR) #140
Description
So far, mqt-predictor uses different types of IR for its method interfaces, such as Qiskit.QuantumCircuit, TKET.Circuit, str, or Path to stored quantum circuits. This should be unified.
This should also be reflected in, e.g., rl.helper.qcompile that currently accepts only Qiskit.QuantumCircuit or a Path but no TKET.Circuit object.