Add Assign to Jsonata choices

[kddejong]

Issue #, if available:
fix #4128

Description of changes:

• Add Assign to Jsonata choices

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.24%. Comparing base (cc27d5f) to head (3a8f12b).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4130      +/-   ##
==========================================
- Coverage   94.24%   94.24%   -0.01%     
==========================================
  Files         396      396              
  Lines       13443    13443              
  Branches     2672     2672              
==========================================
- Hits        12670    12669       -1     
  Misses        425      425              
- Partials      348      349       +1     

Flag	Coverage Δ
unittests	94.22% <ø> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.