Support PEP 751 lockfiles as an output format

[edgarrmondragon]

With PEP 751 being accepted, it'd be nice if this plugin could add support for pylock.toml as an output format too for interoperability, as workflows begin to adopt the it.

Probably something like this

poetry export --format=pylock.toml

Related issues in other tools

Consumers

• Implement installation from PEP 751 aka standardized lockfiles pypa/pip#13334
• Add pylock.toml to uv pip install and uv pip sync astral-sh/uv#12992

Producers

• PEP 751 experimental pip lock command pypa/pip#13213
• Add uv export support for PEP 751 astral-sh/uv#12955
• Support exporting to PEP 751 py lock pdm-project/pdm#3480
• Support PEP-751 lockfiles pex-tool/pex#2735

Additional links

• https://pip.pypa.io/en/latest/cli/pip_lock/
• https://docs.astral.sh/uv/reference/cli/#uv-export--format

[radoering]

Related discussion: https://github.com/orgs/python-poetry/discussions/10322#discussioncomment-12732299
Related issue for poetry itself: python-poetry/poetry#10356