Replace FilePointer with universal pathlib

[delucchi-cmu]

See astronomy-commons/hats#336

Solution Description

Use fsspec's project, universal-pathlib as a path provider. In this way, everywhere we currently pass in a FilePointer we can use a Path instead, and when we need to create remote connections, use UPath.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.86%. Comparing base (90e0e72) to head (025da5d).
Report is 7 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #413   +/-   ##
=======================================
  Coverage   97.86%   97.86%           
=======================================
  Files          44       44           
  Lines        1545     1547    +2     
=======================================
+ Hits         1512     1514    +2     
  Misses         33       33           

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Before [a94b85b]	After [7620281]	Ratio	Benchmark (Parameter)
failed	failed	n/a	benchmarks.time_box_filter_on_partition
failed	11.8±0.07s	n/a	benchmarks.time_create_large_catalog
failed	1.75±0.02s	n/a	benchmarks.time_create_midsize_catalog
failed	90.9±0.6ms	n/a	benchmarks.time_kdtree_crossmatch
failed	26.7±0.7ms	n/a	benchmarks.time_polygon_search

Click here to view all benchmarks.

[delucchi-cmu]

Documentation issue will require astronomy-commons/hats-import#387, but I'd like to send for review for general comments.

[smcguire-cmu]

Soo nice to be getting rid of storage options from everywhere