feat(hero): image start

feat(hero): update styles for logical properties and start image alignment

feat(hero): rails - add image-start class to erb

docs(hero): rails - rework doc page examples and images

feat(hero): rails - add image_start prop to rb

feat(hero): rails - add props for inline start image option

docs(hero): rails - component description update

feat(hero): rails - add new hero image

feat(hero): react - make the updates to react code for image start

docs(hero): react - add mdx base file

docs(hero): react - add images to mdx and create first story setup

docs(hero): react - work out examples for contained images

docs(hero): react - add prop definitions

docs(hero): react - update when to use and not to use sections

docs(hero): react - get the examples to render like rails

docs(hero): rails - update the alt text to match image

docs(hero): react and rails - update descriptions and output react prop table

docs(hero): rails - update props, rules do, rules dont

docs(hero): react - set bool default values to other than null

docs(hero): scss - update breakpoint to use variable

docs(hero): react - add borderless prop to the examples

docs(hero): rails - update naming of visual examples

docs(hero): update outline of documentation

fix(hero): react - correct ctaAttribute prop type