Update tooling

[jodal]

• Switch from Poetry to uv
• Update tox to use tox-uv

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 61.66%. Comparing base (6118e60) to head (e803e8c).
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #598   +/-   ##
=======================================
  Coverage   61.66%   61.66%           
=======================================
  Files          52       52           
  Lines        2165     2165           
=======================================
  Hits         1335     1335           
  Misses        830      830           

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