add pie wedge segmented aperture

[mperrin]

• Adds a WedgeSegmentedCircularAperture class, for defining pie-wedge or keystone-shaped apertures; some of the aperture geometries under consideration for HWO need this kind of aperture.
• Also, minor enhancement to radial_profile function adding a custom_function parameter, which lets you compute an arbitrary function evaluated in over each radial bin, for instance the min or max at a given radius. This generalizes the prior approach used for computing std dev or median absolute deviation in each bin. \
• Tests for both the above are included.

Example:

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (9fa90e1) 74.13% compared to head (21f916a) 74.30%.
Report is 2 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #604      +/-   ##
===========================================
+ Coverage    74.13%   74.30%   +0.16%     
===========================================
  Files           18       18              
  Lines         6558     6600      +42     
===========================================
+ Hits          4862     4904      +42     
  Misses        1696     1696              

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[obi-wan76]

Looks good, working as intended, in particular, the test_WedgeSegmentedCircularAperture function