EXP: Sky region support

[pllim]

DO NOT MERGE: An idea that goes with

• EXP: Sky region support spacetelescope/jdaviz#2250

Related:

• Add support for sky regions in translator #89

[codecov]

Codecov Report

Patch coverage: 66.66% and project coverage change: -0.46 ⚠️

Comparison is base (755874d) 96.92% compared to head (2af04c2) 96.47%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #94      +/-   ##
==========================================
- Coverage   96.92%   96.47%   -0.46%     
==========================================
  Files          18       18              
  Lines        1399     1418      +19     
==========================================
+ Hits         1356     1368      +12     
- Misses         43       50       +7     

Impacted Files	Coverage Δ
glue_astronomy/translators/regions.py	88.75% <66.66%> (-3.45%)	⬇️

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[pllim]

Going to fold another version of this into #93