feat: Add Program#control_flow_graph() method

[MarquessV]

Description

closes #1761

Needs rigetti/quil-rs#359 to be merged and deployed before for the code in this PR to work in CI.

Checklist

• [X] The PR targets the master branch
• [X] The above description motivates these changes.
• [X] The change is atomic and can be described by a single commit (your PR will be squashed on merge).
• [X] All changes to code are covered via unit tests.
• [X] Parameters and return values have type hints with PEP 484 syntax.
• [X] Functions and classes have useful Sphinx-style docstrings.
• [x] (New Feature) The docs have been updated accordingly.

[github-actions[bot]]

☂️ Python Coverage

current status: ✅

Overall Coverage

Lines	Covered	Coverage	Threshold	Status
7251	6396	88%	87%	🟢

New Files

File	Coverage	Status
pyquil/control_flow_graph.py	100%	🟢
TOTAL	100%	🟢

Modified Files

File	Coverage	Status
pyquil/quil.py	84%	🟢
TOTAL	84%	🟢

updated for commit: 5eb3b1a by action🐍