chore: add rowspan demo with show/hide column with full remapping

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (284a074) to head (698b736).
Report is 4 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master     #1543   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            7         7           
  Lines         1031      1031           
  Branches       373       378    +5     
=========================================
  Hits          1031      1031           

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