skpkg: recut morph package

[stevenhua0320]

@sbillinge ready to review. In this PR:
we do a recut for the diffpy.morph package. Since it has been python 3.14, we will only do the package update here.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.93%. Comparing base (9981f82) to head (5a8f02e).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #311   +/-   ##
=======================================
  Coverage   99.93%   99.93%           
=======================================
  Files          24       24           
  Lines        1570     1624   +54     
=======================================
+ Hits         1569     1623   +54     
  Misses          1        1           

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[sbillinge]

This is almost perfect. Please just update my email everywhere to sbillinge@ucsb.edu. Then I can merge.