New storage adapters and demo

[jchris]

There's a new AWS S3 Connect module, and a minimal Vanilla JS test app for it here.

Each list corresponds to a database stored in S3. You can do multi user stuff with a shared meta file, but it gets choppy quicky due to last write wins semantics.

S3 is an excellent choice for CAR file storage, but the AWS adapter should be enhanced to use something like Cognito/Dynamo/Lambda for metadata management.

There is also a raw storage module you can use to connect to any REST backend or key / value store.