Live Editor in the Docs ✨

[justsml]

When I look at the API docs I frequently wish I could see example output. Sometimes I want to visualize what turf.simplify(data, { tolerance: 0.001 }) will do to my data.

So, I used a codemod tool I've been working on to add this PR to the docs project.

It turns out this might be better handled in the main project, and probably warrants a larger discussion. (Thanks @smallsaucepan)

[ethanchristensen01]

I just got introduced to turf today, and this feature would be pretty handy. If we want to keep the doc pages simple, we could link to an equivalent example in turf-sandbox.