Switch to uv for package management

[johnpaulett]

Summary

• use pyproject.toml with hatchling
• dev installs via uv sync
• update Makefile, tox, and docs for uv
• mention pyproject conversion in changelog

Testing

• make coverage
• make lint

---

https://chatgpt.com/codex/tasks/task_b_684323538f348327a464fadbae09c6e0

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.81%. Comparing base (0f43c75) to head (6b55174).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #67      +/-   ##
==========================================
- Coverage   90.08%   89.81%   -0.28%     
==========================================
  Files          22       20       -2     
  Lines        1654     1610      -44     
  Branches      246      233      -13     
==========================================
- Hits         1490     1446      -44     
  Misses        117      117              
  Partials       47       47              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.