feat(footer): add Footer Totals Row and fix footer styling

[ghiscoding]

• this new demo was mainly doable before but this PR also includes CSS styling fixes for the footer totals to show up correctly including fixes for the Dark Mode as well

[stackblitz]

Run & review this pull request in StackBlitz Codeflow.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.8%. Comparing base (cbd6ae4) to head (8d4aec0).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff            @@
##           master   #1576     +/-   ##
========================================
+ Coverage    99.8%   99.8%   +0.1%     
========================================
  Files         198     198             
  Lines       21759   21764      +5     
  Branches     7145    7148      +3     
========================================
+ Hits        21698   21703      +5     
  Misses         55      55             
  Partials        6       6             

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