chore: switch to versioningit

[JP-Ellis]

📝 Summary

Switch from hatch-vcs to versioningit.

🚨 Breaking Changes

🔥 Motivation

I have been finding hatch-vcs (built on top of setuptools-scm) to be a bit too finicky.

🔨 Test Plan

🔗 Related issues/PRs

[Copilot]

Pull request overview

This PR migrates the versioning system from hatch-vcs (based on setuptools-scm) to versioningit across three Python packages in the repository. The change aims to address reliability issues experienced with hatch-vcs.

Key changes:

• Replaced hatch-vcs with versioningit in build dependencies
• Simplified version configuration by removing complex git describe commands and raw options
• Added versioningit configuration sections with tag matching, prefix removal, and version file generation

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
pyproject.toml	Migrated main pact-python package to versioningit, removed hatch-vcs from dependencies and dev environment
pact-python-ffi/pyproject.toml	Migrated pact-python-ffi package to versioningit with appropriate tag matching pattern
pact-python-cli/pyproject.toml	Migrated pact-python-cli package to versioningit with appropriate tag matching pattern

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 52%. Comparing base (8009ddb) to head (c785c67).
⚠️ Report is 5 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@         Coverage Diff          @@
##           main   #1397   +/-   ##
====================================
  Coverage    51%     52%           
====================================
  Files        31      32    +1     
  Lines      3729    3805   +76     
====================================
+ Hits       1938    2000   +62     
- Misses     1791    1805   +14     

Flag	Coverage Δ
tests	52% <ø> (+<1%)	⬆️

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