v0.6.0

Highlights

• Adds multi-frontend Python API support beyond Qiskit: Cirq direct analysis plus experimental normalized Braket, PennyLane QuantumTape, PyQuil, and Qibo inputs through Mitiq/Cirq.
• Keeps the CLI QASM-only while preserving the native Qiskit/QASM path.
• Adds frontend metadata on CircuitFeatures with frontend and analysis_basis.
• Adds explicit preview behavior: Qiskit/Cirq preview is supported; converted optional frontends skip preview with a clear warning.
• Adds optional frontend extras and an isolated maintainer checker for real SDK smoke validation.
• Updates README and docs with the current support matrix and frontend caveats.

Validation

• ruff format --check .
• ruff check .
• pytest -ra (564 passed, 8 skipped, 21 warnings)
• pytest --cov=emrg --cov-report=term-missing (96% coverage)
• emrg --version -> emrg, version 0.6.0
• Bell QASM analyze/generate smokes
• tools/check_optional_frontends.py --all --require-all
• python -m build
• twine check dist\*
• wheel smoke import from emrg-0.6.0-py3-none-any.whl