Docs: Add deeper getting started docs, to be done after quickstart

### Background
Currently the docs have a small quickstart section followed by a couple of sections of helpful functions, and then function argument documentation.

We want to hold user's hands a little bit longer through the process than we currently do.

Some things to consider including:
- the different types of graphs to draw
- how to draw them
- how to connect giraffe to your data
- how to integrate giraffe with redux

### Acceptance Criteria
- After the quickstart, the docs explain how to deeply integrate Giraffe using npm/yarn and react

Start by locating the documentation's quickstart and the sections that follow it. Extend the getting-started path to cover graph types, connecting Giraffe to data, Redux integration, and npm/yarn use with React; done when the documentation explains deeper integration after the quickstart.

Written by the indexing model from the issue text.