Add range slider from image and datawrapper switcher

[sophiamersmann]

In image switcher: https://github.com/rbb-data/image-switcher/tree/feature/image-slider/src/components/ImageSlider

In data wrapper switcher: https://github.com/rbb-data/datawrapper-switcher/tree/feature/slider/src/components/_shared/RangeSlider