garden/agora-howto.md

Agora Howto

• flancia.org/go/agora-howto -> https://github.com/flancian/agora/blob/master/docs/howto.md
• Should be a high level walkthrough from zero to "you know how to navigate the Agora" and "you have a digital garden and you know how to integrate it into the Agora if you are willing".