Use pyproject.toml fully instead of setup.py

[mraspaud]

Use pyproject.toml to entirely remove setup.py

This PR was generated mainly using AI

• Tests passed
• Closes Cannot import unless being in the pyresample source root - when installing with pip (not using conda-forge) #722

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.66%. Comparing base (b23310e) to head (3b1287b).
⚠️ Report is 20 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #721   +/-   ##
=======================================
  Coverage   93.66%   93.66%           
=======================================
  Files          89       89           
  Lines       13707    13707           
=======================================
  Hits        12838    12838           
  Misses        869      869           

Flag	Coverage Δ
unittests	93.66% <100.00%> (ø)

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[djhoese]

These 2 lines can't be combined?

[mraspaud]

My understanding is that hatch-cython wants them separate

[djhoese]

The unstable environment in CI might need to be updated to not install versioneer. And maybe the RTD config too.

I'm fine with this, but it does scare me for any further customizations that we may want. For example, I think pykdtree's setup.py has a lot of custom stuff depending on what it finds in the environment (ex. OpenMP) so I'm worried about what pyresample would have to do to handle a similar case.

[adybbroe]

This saved my (PCW) week, thanks Martin!
I will make an issue shortly...

[adybbroe]

Should close #722 (edited the pre-amble reflecting that - see above)

[mraspaud]

The unstable environment in CI might need to be updated to not install versioneer. And maybe the RTD config too.

I'm fine with this, but it does scare me for any further customizations that we may want. For example, I think pykdtree's setup.py has a lot of custom stuff depending on what it finds in the environment (ex. OpenMP) so I'm worried about what pyresample would have to do to handle a similar case.

Noted! I think we will be able to fix this though, so we'll go ahead and merge this.

[adybbroe]

LGTM