Added from_qiskit() and from_qasm() for Qiskit/OpenQASM interoperability

[QuantumRaul]

Summary

This PR adds two new functions to enable interoperability between Qiskit and CUDA-Q:

• cudaq.from_qiskit(qiskit_circuit): Converts a Qiskit QuantumCircuit to a CUDA-Q kernel
• cudaq.from_qasm(file_path): Loads an OpenQASM file and converts it to a CUDA-Q kernel

Supported Gates

Category	Gates
Single qubit	h, x, y, z, s, t, sdg, tdg, id
Two qubit	cx, cy, cz, ch, swap, rxx, rzz
Three qubit	ccx (Toffoli)
Parametric	rx, ry, rz, r1, p, u3, u
Controlled parametric	crx, cry, crz
Special	sx, sxdg, barrier, measure

Example Usage

from qiskit import QuantumCircuit
import cudaq

# Create a Bell state in Qiskit
qc = QuantumCircuit(2)
qc.h(0)
qc.cx(0, 1)

# Convert to CUDA-Q and run on GPU
kernel = cudaq.from_qiskit(qc)
result = cudaq.sample(kernel)
print(result)  # {'00': 500, '11': 500}

Documentation

Documentation is provided via comprehensive docstrings in the source code.
Additional user guide documentation can be added in a follow-up PR if desired.

[copy-pr-bot]

This pull request requires additional validation before any workflows can run on NVIDIA's runners.

Pull request vetters can view their responsibilities here.

Contributors can view more details about this message here.