feat: Introduce slot for customizing course tab navigation

[xitij2000]

Adds a new plugin slot (CourseTabsNavigationSlot) to enable customization, modification, or hiding of the course tab navigation. Updated relevant components to integrate with the new slot.

(cherry picked from commit 7f656ce)

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.32%. Comparing base (a995ce0) to head (db27169).

Additional details and impacted files

@@                 Coverage Diff                  @@
##           release/verawood    #1931      +/-   ##
====================================================
+ Coverage             91.29%   91.32%   +0.02%     
====================================================
  Files                   343      345       +2     
  Lines                  5770     5785      +15     
  Branches               1388     1389       +1     
====================================================
+ Hits                   5268     5283      +15     
  Misses                  483      483              
  Partials                 19       19              

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