Closes #33 color contrast in demo website

[quentinderoubaix]

Enable the color contrast rule in the e2e accessibility tests.
Also added an onload function to change the iframe heights after the sample is loaded.

[codecov]

Codecov Report

Merging #37 (79192dd) into main (4045c82) will decrease coverage by 1.83%.
Report is 1 commits behind head on main.
The diff coverage is n/a.

❗ Current head 79192dd differs from pull request most recent head c1eda5f. Consider uploading reports for the commit c1eda5f to get more accurate results

@@            Coverage Diff             @@
##             main      #37      +/-   ##
==========================================
- Coverage   85.32%   83.49%   -1.83%     
==========================================
  Files          60       60              
  Lines        1785     1818      +33     
  Branches      359      362       +3     
==========================================
- Hits         1523     1518       -5     
- Misses        211      251      +40     
+ Partials       51       49       -2     

Flag	Coverage Δ
e2e-1	70.57% <ø> (ø)
e2e-10	77.11% <ø> (ø)
e2e-2	81.91% <ø> (?)
e2e-3	81.91% <ø> (ø)
e2e-4	52.33% <ø> (-0.41%)	⬇️
e2e-5	80.41% <ø> (ø)
e2e-6	80.41% <ø> (ø)
e2e-7	73.23% <ø> (ø)
e2e-8	77.01% <ø> (ø)
e2e-9	66.18% <ø> (ø)
unit	93.08% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

see 18 files with indirect coverage changes

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[divdavem]

👍 Thank you for your PR!