Use poetry v2.0.0

[youtux]

Bump poetry to version 2.0.0 and fix a few deprecation warnings.

Also add poetry pre-commit hook to check that the config is correct and that poetry.lock is in sync.

Supersedes #760

[Copilot]

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.10%. Comparing base (4825505) to head (c97dc02).
Report is 15 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #762   +/-   ##
=======================================
  Coverage   96.10%   96.10%           
=======================================
  Files          55       55           
  Lines        2390     2390           
  Branches      136      136           
=======================================
  Hits         2297     2297           
  Misses         56       56           
  Partials       37       37           

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[Copilot]

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