Issue #3305046: Start structure of Cucumber UI module

LICENSE.txt

README.md

composer.json

config/install/cucumber_ui.settings.yml

config/schema/cucumber_ui.schema.yml

css/theme/cucumber-ui.style.theme.css

cucumber_ui.info.yml

cucumber_ui.install

cucumber_ui.libraries.yml

cucumber_ui.links.menu.yml

cucumber_ui.links.task.yml

cucumber_ui.module

cucumber_ui.permissions.yml

cucumber_ui.routing.yml

gulpfile.js

images/down-hover.png

images/down.png

images/loading.gif

images/remove-hover.png

images/remove.png