Add option uv export --exclude-editable

[vivienm]

I use pip-audit in my projects for scanning packages with known vulnerabilities. It can be given a requirements.txt file to audit. This could play nice with the new uv export feature, but fails because of the editable entry for the project package:

$ uv export --format requirements-txt
# This file was autogenerated via `uv export`.
-e .
[...]

$ pip-audit --disable-pip --requirement <(uv export --format requirements-txt)
ERROR:pip_audit._cli:requirement --editable . does not contain a hash

$ pip-audit --skip-editable --disable-pip --requirement <(uv export --format requirements-txt)
ERROR:pip_audit._cli:requirement --editable . does not contain a hash

The uv pip freeze command has an --exclude-editable option to remove editable packages from output. A similar option for uv export would help here :)

$ pip-audit --disable-pip --requirement <(uv export --format requirements-txt --exclude-editable)

For the moment, my workaround is to exclude editable packages with grep, but this is cumbersome:

$ pip-audit --disable-pip --requirement <(uv export --format requirements-txt | grep -v '^-e ')