Added a Python QJIT code for GHZ example

from qcor import qjit, qalloc

# Import from Qiskit qiskit_circuit

# GHZ kernel expressed as QCOR's qjit

# from qcor import qreg, set_shots

# @qjit

# def ghz(q : qreg):

#   H(q[0])

#   for i in range(q.size() - 1):

#     CX(q[i], q[i + 1])

#   for i in range(q.size()):

#     Measure(q[i])

# # Allocate 3 qubits

# q = qalloc(3)

# # Run the bell experiment

# set_shots(1024)

# ghz(q)

# q.print()

# Or, import the IR from a Qiskit's QuantumCircuit

import qiskit

# Generate 3-qubit GHZ state with Qiskit