make the p2p web with dat's primitives

dat-quickstart.md

low level primitives (in ascending abstraction)

• hypercore works with individual posts in an append-only feed
• hyperdrive abstracted filestore / works with files
• hyperdiscovery create p2p swarms for hypercores, hyperdrives, and hyperdbs
• hyperdb key-value database

higher level abstractions

• webdb database; basically a document(?) store
• dat-node built ontop of hypercore & hyperdrive, abstracts a bunch of stuff; less complex but also less flexible

hypercore + hyperdiscovery example