Roadmap to stable release

[pradyunsg]

• Add components as discussed in Brainstorm some components that should be in this theme #11
• Have at least 2 downstream themes that derive from this, during the pre-stable phase.
  • Furo
  • Lutra
• Flesh out the documentation #33

[pradyunsg]

OK, I think I'm basically ready to call this 1.0.0 once the documentation work is done.

If the folks watching this repository have thoughts on more things that this might need to be considered good-enough to have a stability policy, lemme know! ^>^