E2E Tests now verify if page requests only the expected files

[JCQuintas]

Description

• Updated E2E tests to verify if only the necessary files were requested by the client side backend

Tasks

• Added documentation
• Added tests

[codecov]

Codecov Report

Merging #15 (52efa6a) into main (0a09b57) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##              main       #15   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           12        12           
  Lines          123       123           
  Branches        33        29    -4     
=========================================
  Hits           123       123           

Flag	Coverage Δ
Unit	100.00% <ø> (ø)

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