Better documentation navigation

[colesimmons]

If I come to the documentation and I know I want to go to "Blur Input" (for example), it is not easy enough to get there. At the very least you have to scroll down and click the link to jump down. There should be something like a sidebar to be able to jump down easily. Also, as more components are added, groupings of components would be nice.

I'd be happy to take the lead on this if y'all would like!