Move any docs/overviews to this site

[chasenlehara]

@leoj3n, any docs you’ve worked on over the last couple weeks should be made visible in this site. If you’ve made notes in issues or other repos, like bit-docs/bit-docs#11, they should be added to one of the current bit-docs repos or this one if that makes the most sense.

[leoj3n]

• Plugin Docs: initial plugin documentation #13
• Guides: bit-docs-website/docs/bit-docs/guides
  • Flow: bit-docs-website/docs/bit-docs/guides/contributing.md
  • High Level Overview: bit-docs-website/docs/bit-docs/guides/high-level-overview.md