feat: add Circuit.from_pyquil import

[huhaha120]

Summary

• Add Circuit.from_pyquil() to import pyQuil Program objects into Marqov circuits.
• Support the canonical gate set from CONTRIBUTING.md: H, X, Y, Z, S, T, RX, RY, RZ, CNOT, CZ, and SWAP.
• Add a pyquil optional dependency extra and include it in the all extra.
• Add focused tests for canonical gate mapping, unsupported gates, symbolic rotation parameters, a hand-written Bell-pair Quil program, and a to_pyquil() / from_pyquil() round-trip.

Closes #4

Tests

• python3 -m py_compile marqov/circuits.py tests/test_circuits.py
• uv run --python 3.12 --with ruff ruff check marqov/circuits.py tests/test_circuits.py
• uv run --python 3.12 --extra dev --extra pyquil python -m pytest tests/test_circuits.py::TestFromPyquil -q
• git diff --check

AI Assistance Disclosure

This contribution was AI-assisted. I used Codex as a coding assistant, reviewed the issue requirements and implementation scope, and verified the change locally with the tests listed above.

[ddri]

Thanks for the PR. I see you've made a large amount of PRs on a large number of projects in the unitaryHACK listing. The concern here would be that Codex has done all the work, and there's not been any good-faith effort to really understand the project, make thoughtful decisions, and properly test the solution in context.

To help me understand if that's the case, I'd like to hear your thoughts on this, and talk a little about your experience and approach using the Marqov SDK.