Test on Windows OS.

[delucchi-cmu]

Now that we don't depend on healpy, everything should run well on Windows. This adds a test to confirm that.

lsst-sphgeom is not available for windows, so this makes it an optional dependency, conditionally disabling tests that require it.

See: astronomy-commons/hats#440

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.40%. Comparing base (dd92005) to head (c151c8b).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #522   +/-   ##
=======================================
  Coverage   97.40%   97.40%           
=======================================
  Files          43       43           
  Lines        1697     1697           
=======================================
  Hits         1653     1653           
  Misses         44       44           

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[github-actions]

Before [dd92005]	After [842bb2c]	Ratio	Benchmark (Parameter)
failed	failed	n/a	benchmarks.time_box_filter_on_partition
failed	failed	n/a	benchmarks.time_polygon_search
92.9±1ms	94.7±1ms	1.02	benchmarks.time_kdtree_crossmatch
2.17±0s	2.14±0.03s	0.99	benchmarks.time_create_midsize_catalog
14.6±0.03s	14.3±0.1s	0.98	benchmarks.time_create_large_catalog

Click here to view all benchmarks.