Add Github Action to run Cypress tests

[cafca]

Closes https://github.com/FixMyBerlin/fixmy.platform/issues/437

[codecov]

Codecov Report

Merging #533 into develop will decrease coverage by 0.22%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop     #533      +/-   ##
===========================================
- Coverage    25.27%   25.04%   -0.23%     
===========================================
  Files          374      374              
  Lines         7561     7570       +9     
  Branches      1932     1934       +2     
===========================================
- Hits          1911     1896      -15     
- Misses        5257     5281      +24     
  Partials       393      393              

Flag	Coverage Δ
#unittests	25.04% <ø> (-0.23%)	⬇️

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

Impacted Files	Coverage Δ
src/utils/polyfill-intl.ts	32.07% <0.00%> (-37.74%)	⬇️
src/pages/Reports/state/OverviewMapState.js	90.00% <0.00%> (-7.57%)	⬇️
src/pages/Reports/state/initialState.js	100.00% <0.00%> (ø)
...ges/OverviewMap/components/ReportDetails/Header.js	0.00% <0.00%> (ø)

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