doc work + type hints + refactor – artifacts.py -- dangles

[jGaboardi]

This PR:

• adds docstring + type hints to artifacts.remove_dangles()
• adds docstring + type hints to artifacts.is_dangles()
• does small internal refactor within artifacts.is_dangles()
• xref testing, refactor, & docstrings #20

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.8%. Comparing base (42701b2) to head (947221a).
Report is 1 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #125   +/-   ##
=====================================
  Coverage   98.8%   98.8%           
=====================================
  Files          6       6           
  Lines        960     962    +2     
=====================================
+ Hits         948     950    +2     
  Misses        12      12           

Files with missing lines	Coverage Δ
sgeop/artifacts.py	97.9% <100.0%> (+<0.1%)	⬆️