Packaging utils

[percevalw]

Description

New packaging utility to allow:

pipeline = edspdf.Pipeline()
pipeline.add_pipe(...)
# or
pipeline = train()

and to package

pipeline.package("my-model")

to generate the .tar.gz / .whl dist files, adding dependencies, while using the existing pyproject.toml if any.

Checklist

• If this PR is a bug fix, the bug is documented in the test suite.
• Changes were documented in the changelog (pending section).
• If necessary, changes were made to the documentation.

[codecov]

Codecov Report

Patch coverage is 98.94% of modified lines.

Files Changed	Coverage
edspdf/utils/package.py	98.90%
edspdf/pipeline.py	100.00%

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