Refactor PDFmorph to diffpy.morph

[Sparks29032]

All tests pass on local. Links need to be fixed by refactoring this repository from diffpy.pdfmorph to diffpy.morph.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.85%. Comparing base (6526430) to head (c196bc3).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #172   +/-   ##
=======================================
  Coverage   96.85%   96.85%           
=======================================
  Files          18       18           
  Lines         795      795           
=======================================
  Hits          770      770           
  Misses         25       25           

Files with missing lines	Coverage Δ
tests/test_morph_func.py	100.00% <100.00%> (ø)
tests/test_morphapp.py	99.04% <100.00%> (ø)
tests/test_morphchain.py	96.96% <100.00%> (ø)
tests/test_morphio.py	100.00% <100.00%> (ø)
tests/test_morphpdftordf.py	96.00% <100.00%> (ø)
tests/test_morphrdftopdf.py	96.00% <100.00%> (ø)
tests/test_morphresolution.py	95.83% <100.00%> (ø)
tests/test_morphrgrid.py	98.33% <100.00%> (ø)
tests/test_morphscale.py	95.65% <100.00%> (ø)
tests/test_morphshape.py	95.83% <100.00%> (ø)
... and 7 more

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[Sparks29032]

@sbillinge Should only require renaming this repository before we can merge.