docs: refine the documentation and make some style changes

[Sparkier]

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[cabreraalex]

I think I preferred the quickstart instructions for a project on the home page of the docs, getting right to the point?

[Sparkier]

I think I preferred the quickstart instructions for a project on the home page of the docs, getting right to the point?

Then I think we remove the introductory text. There was a bunch of text on the same page before the instructions which I think distracted from the walkthrough.

Maybe this could also be solved with something like what Graham talked about where we have the most important commands on the home page.

[Sparkier]

updated @cabreraalex