DM-35347: Switch to pyproject.toml

[mwittgen]

Checklist

• ran Jenkins
• added a release note for user-visible changes to doc/changes

[codecov]

Codecov Report

Merging #260 (5dd1069) into main (d1a5d7e) will decrease coverage by 0.09%.
The diff coverage is n/a.

❗ Current head 5dd1069 differs from pull request most recent head f593743. Consider uploading reports for the commit f593743 to get more accurate results

@@            Coverage Diff             @@
##             main     #260      +/-   ##
==========================================
- Coverage   72.29%   72.20%   -0.10%     
==========================================
  Files          60       60              
  Lines        6768     6734      -34     
  Branches     1393     1387       -6     
==========================================
- Hits         4893     4862      -31     
+ Misses       1651     1649       -2     
+ Partials      224      223       -1     

Impacted Files	Coverage Δ
python/lsst/pipe/base/config.py	68.42% <0.00%> (-1.08%)	⬇️
python/lsst/pipe/base/graph/graph.py	81.81% <0.00%> (-0.85%)	⬇️
...thon/lsst/pipe/base/graph/_versionDeserializers.py	63.20% <0.00%> (-0.55%)	⬇️
python/lsst/pipe/base/pipeline.py	61.52% <0.00%> (-0.10%)	⬇️
python/lsst/pipe/base/testUtils.py	92.46% <0.00%> (ø)
python/lsst/pipe/base/graph/_loadHelpers.py	84.61% <0.00%> (ø)
tests/test_quantumGraph.py	95.58% <0.00%> (+0.44%)	⬆️
python/lsst/pipe/base/tests/simpleQGraph.py	69.93% <0.00%> (+0.45%)	⬆️

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[timj]

Looks fine. I think the mypy fixes are waiting on #259

[mwittgen]

Added two commits with the black and isort fixes, running jenkins right now.