[WIP] apply new cookiecutter template from stsci-package-template

[zacharyburnett]

using the template from spacetelescope/stsci-package-template#36

Tasks

• update or add relevant tests
• update relevant docstrings and / or docs/ page
• Does this PR change any API used downstream? (if not, label with no-changelog-entry-needed)
  • write news fragment(s) in changes/: echo "changed something" > changes/<PR#>.<changetype>.rst (see changelog readme for instructions)
  • run regression tests with this branch installed (stpipe@git+https://github.com/<fork>/stpipe.git@<branch>)
    • jwst regression test
    • romancal regression test

[codecov]

Codecov Report

❌ Patch coverage is 0% with 9 lines in your changes missing coverage. Please review.
✅ Project coverage is 2.53%. Comparing base (a75274a) to head (2f616d6).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/stpipe/_version.py	0.00%	9 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (a75274a) and HEAD (2f616d6). Click for more details.

HEAD has 2 uploads less than BASE

Flag	BASE (a75274a)	HEAD (2f616d6)
	4	2

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #306       +/-   ##
==========================================
- Coverage   95.66%   2.53%   -93.13%     
==========================================
  Files          35      38        +3     
  Lines        3391    3386        -5     
  Branches        0     453      +453     
==========================================
- Hits         3244      86     -3158     
- Misses        147    3300     +3153     

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