The Getting Started guide does not segue into content

[tmcw]

I recently ported my site from Jekyll to 11ty and it went pretty well! It did give me a lot of ideas for how the documentation could be better. Specifically, the getting started guide shows how to set up a barebones template, but not how to deal with content:

This says "Add more content" but it doesn't talk about adding a content collection, or using layouts to render content, it instead pushes users into the documentation for template types, which is pretty technical and not necessarily that great for people at this stage of adoption.

I feel like the next step should actually talk about adding content, what a collection is, and show how to interpolate content within a layout.

Happy to take a pass at writing these docs if people agree!

[tmcw]

#1897 is my attempt at making this better!