Testing AE releases: harnesses manager, Jest, Cypress and docs

[Callo]

New

• improved docs in nearly all areas (https://testing.quasar.dev/)
• feat(cypress): ignore videos and screenshots generated by CI execution
• chore(testing): updated deps
• chore(jest): updated deps
• chore(cypress): updated deps

Fixes

• fix(cypress): update workaround for ResizeObserver exception
• fix(testing): ensure test command works as expected with Jest and Cypress in CI mode
• fix(cypress): make npm scripts work on windows (#143)
• fix(jest): vue-jest parse pug as html (#139)
• fix(jest): disable coverage by default (#137)
• fix(jest): SFC test loader matcher (#134)