Attempt to ignore cq-vtk data in doc search

[lorenzncode]

Add role="navigation"

[lorenzncode]

This is an attempt to fix #1481.

It looks like search is disabled for PR builds so cannot verify if it works.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.86%. Comparing base (e486f43) to head (e7aa0f4).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1975   +/-   ##
=======================================
  Coverage   95.86%   95.86%           
=======================================
  Files          29       29           
  Lines        7949     7949           
  Branches     1194     1194           
=======================================
  Hits         7620     7620           
  Misses        191      191           
  Partials      138      138           

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