Add docs for outlier detection step.

[mairanteodoro]

Resolves RCAL-503

This PR adds the documentation for the outlier detection step.

Successfully ran the regression tests, and the results are available here.

Checklist

• added entry in CHANGES.rst under the corresponding subsection
• updated relevant tests
• updated relevant documentation
• updated relevant milestone(s)
• added relevant label(s)
• ran regression tests, post a link to the Jenkins job below. How to run regression tests on a PR

[schlafly]

These look good to me. There are a few leftover references to JWST that should probably be purged, though it's also probably virtuous to reference that the step's heritage is from Webb. I forget whether the TSO code remained in the step or not; if not, it probably doesn't belong in the docs.

[nden]

@mairanteodoro What is the status of this? Is it ready to be moved out of Draft status?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.94%. Comparing base (d0fa876) to head (2f0cd4a).
Report is 476 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1042   +/-   ##
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  Coverage   70.94%   70.94%           
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  Files         105      105           
  Lines        6979     6979           
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  Hits         4951     4951           
  Misses       2028     2028           

Flag	Coverage Δ		*Carryforward flag
nightly	63.06% <ø> (ø)		Carriedforward from d0fa876

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[mairanteodoro]

@mairanteodoro What is the status of this? Is it ready to be moved out of Draft status?

Yes, it is. Thanks for the reminder, @nden!

[ddavis-stsci]

A few, mostly minor comments, but I think it looks good.

[nden]

The spec section does not render nicely. The problem was solved in the jwst pipeline, see a PR from Brett

[mairanteodoro]

The spec section does not render nicely. The problem was solved in the jwst pipeline, see a PR from Brett

Done. Applied fix implemented in PR#8101.