Setup up scatter charts demo (first pass)

[ran-codes]

Action Items

Starting with kitchen sink.

• [x] remove maps
  • [x] components
  • [x] constants
  • [x] actions
  • [x] imports
  • [x] state
• [x] keep only intro, scatter scoller and conclusion
• [x] figure out scroller component: see https://github.com/Drexel-UHC/uhc-svelte-scrolly-template/discussions/6
• [x] simulate scatter/beeswarm data (added median age at county level)
• [x] Add a step that shows scatter of median_age and pop_density
  • [x] add action chart06
  • [x] add added <section/> to `

[ran-codes]

done. first pass finished and deploye