content tabs and rust code for user-defined-functions/map

[yogesh1801]

What this PR does / why we need it

Briefly describe the problem and the solution.

Related issues

Fixes #3026

Testing

How was this tested (unit/integration/manual)? Include commands, links, or screenshots if applicable.

Special notes for reviewers

Anything notable for review (risk, rollout, follow-ups).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.24%. Comparing base (80cbd02) to head (2f3b6cc).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3034      +/-   ##
==========================================
+ Coverage   78.23%   78.24%   +0.01%     
==========================================
  Files         288      288              
  Lines       67654    67654              
==========================================
+ Hits        52926    52935       +9     
+ Misses      14179    14170       -9     
  Partials      549      549              

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[vigith]

What about the unary mode map?

unary map mode is missing