Add Jump documentation (RCAL-115)

[dmggh]

Closes #

Resolves RCAL-115

Description

This PR addresses jump documentation for the jump detection step in Roman.

Checklist

• Tests

• [X ] Documentation

• Change log

• Milestone

• Label(s)

[codecov]

Codecov Report

Merging #257 (c51c89d) into main (b2628d1) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #257   +/-   ##
=======================================
  Coverage   46.38%   46.38%           
=======================================
  Files          35       35           
  Lines         746      746           
=======================================
  Hits          346      346           
  Misses        400      400           

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[ddavis-stsci]

The text looks good but the sphinx error does need to be addressed.

[ddavis-stsci]

LGTM