Initial implementation of documentation

[eliascarv]

I was inspired by the Meshes.jl reference guide to make this reference guide. I think the sections could have better separation and better names.
I'm waiting for your suggestions @juliohm.
Edit:
I put the README text in index.md and added the Transforms docstrings in transforms.md.

[codecov-commenter]

Codecov Report

Merging #52 (958d56b) into master (1c678e7) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #52   +/-   ##
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  Coverage   92.84%   92.84%           
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  Files          19       19           
  Lines         461      461           
=======================================
  Hits          428      428           
  Misses         33       33           

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[juliohm]

Can we have a preview of the docs in the PR? I remember it is possible to configure Documenter.jl and the repo to show a preview. Someone asked this recently on Zulip as well. Can you double check?

[eliascarv]

I updated the examples of the apply and revert functions. @juliohm please take a look.

[juliohm]

Awesome work. 💯

[eliascarv]

Thanks