Create image switcher block

[alexcarol]

This is an element with a similar functionality as centered-content-switcher, but different look and feel, ideally we'd be able to reuse (most) of the js and just implement different css, but some level duplication could be acceptable here (left up to the implementor).

This component has a "flip" variant that determines whether the selector is on the left or right side:

Regular:

• https://www.esri.com/en-us/capabilities/mapping/overview
• https://main--esri--aemsites.hlx.page/en-us/capabilities/mapping/overview Flip:
• https://www.esri.com/en-us/capabilities/3d-gis/features/3d-data-management
• https://main--esri--aemsites.hlx.live/en-us/capabilities/3d-gis/features/3d-data-management

Live site: