[migration] Copy Examples from Old Documentation Site

[hydrosquall]

Before these new docs were made, Semiotic had another set of examples in the library source folder, some of which showcased features of the library which aren't included in the new docs yet.

• The old code can be found here: https://github.com/nteract/semiotic/tree/master/src/docs/components
• To visit the old site:
  • Clone the https://github.com/nteract/semiotic repository
  • run npm install && npm run gh-pages
  • Serve the build folder using a local http server of your choice
  • Alternately, npm start or yarn start can be used to work with a live hot-reloaded version of the site.

This is a non-exhaustive list of examples from the old documentation that I think people could be interested in:

• Shared Tooltip
• Pie/Donut
• Chord Diagram
• Information Model (Transform bar to parallel coordinates) ([examples] Migrate bar to parallel coordinates transformation example #18)
• Legend (See <Legend> missing in docs #7 )
• Faceting
• Violinplot
• ... multiple others! Please edit this issue as you notice additional items.