chore: prefix PyPI package name with cisco

[arthur-goldblatt]

What changed

• Rename the published Python distribution from antares-cli to cisco-antares-cli.
• Regenerate uv.lock with the new distribution name.
• Update PyPI install, upgrade, and wheel commands in the README.
• Point the release environment to the prefixed PyPI project URL.

Why

The unprefixed Antares namespace is already used by multiple projects on PyPI. The agreed cisco- prefix gives the package clear organizational context and avoids naming ambiguity.

User impact

Users install and upgrade the distribution with cisco-antares-cli. The antares command and antares_cli Python module remain unchanged.

Validation

• uv run pytest -q -p no:cacheprovider — 779 passed, 1 skipped
• uv run ruff check src tests tools
• uv run mypy src
• uv build
• uv run python tools/verify_public_wheel.py dist/cisco_antares_cli-0.1.0-py3-none-any.whl
• Confirmed wheel metadata: Name: cisco-antares-cli, version 0.1.0

[didierRI]

Looks good!