Implement utility for compute_mode="adaptive"

[ahuang314]

1. Implements the supersampled_indices field in yaml settings, giving the user the ability to choose which pixels on the grid are supersampled for ray tracing and convolution. Only applied when compute_mode="adaptive" in the Numeric options.
2. Some improvements in documentation
3. Allows for elliptical extra regions in mask settings
4. Implement a utility function that displays plots of mask and supersampled_indices

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (ceb9108) to head (5608806).

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #190   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           15        15           
  Lines         2159      2216   +57     
=========================================
+ Hits          2159      2216   +57     

Files with missing lines	Coverage Δ
dolphin/processor/config.py	100.00% <100.00%> (ø)
dolphin/processor/core.py	100.00% <100.00%> (ø)

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[ajshajib]

Looks great, thank you very much! 🚀