use setuptools-scm for dynamic versioning

[maurerle]

Related Issue

Closes #<issue‑number>
If no issue exists, delete this line.

Description

Creates versions based on the latest git commit or tag if available.
This makes sure that there are no two different code bases with the same installed pip version.

Checklist

• Documentation updated (docstrings, READMEs, user guides, inline comments, doc folder updates etc.)
• New unit/integration tests added (if applicable)
• Changes noted in release notes (if any)
• Consent to release this PR's code under the GNU Affero General Public License v3.0

Additional Notes (optional)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.31%. Comparing base (108dedc) to head (98513c0).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #701       +/-   ##
===========================================
+ Coverage   45.61%   81.31%   +35.69%     
===========================================
  Files          54       54               
  Lines        8032     8032               
===========================================
+ Hits         3664     6531     +2867     
+ Misses       4368     1501     -2867     

Flag	Coverage Δ
pytest	81.31% <ø> (+35.69%)	⬆️

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