Write up documentation for ArrakisND which details how to use it and what the labeling logic is.

[infophysics]

Pointing labeling logic part of the documentation back to the Blip documentation. Added simple beginning of docs for installing and running ArrakisND.

[infophysics]

Started a new overleaf for all Blip/Arrakis documentation. Started adding info about how Arrakis works, will update this a bit at a time: https://www.overleaf.com/2153862865cwrnkzhjyvzm#8203ef.