Support PEP 723 scripts for Python hooks

[j178]

Closes #509

For Python hooks without additional_dependencies, prek will try to read the PEP 723 inline metadata from the entry field. (if shlex.split(entry)[0] is a local file.)

For example:

.pre-commit-config.yaml:

repos:
  - repo: local
    hooks:
      - id: echo
        name: echo
        language: python
        entry: ./echo.py

echo.py:

# /// script
# requires-python = ">=3.13"
# dependencies = [
#     "pyecho-cli",
# ]
# ///

from pyecho import main
main()

Note that:

• The first part of the entry field must be a path to the Python script.
• If you specified additional_dependencies in .pre-commit-config.yaml, script metadata will not be read.
• Setting both the language_version in .pre-commit-config.yaml and requiest-python in the inline metadata, the language_version will be ignored.
• Only the top-level fields dependencies and requires-python in inline metadata are supported, other fields like tool.uv are all ignored.

[potiuk]

Nice!

[nathanjmcdougall]

This is a really cool feature.

[potiuk]

Indeed ;)