Work in progress toolkit for working with a relational database in Jai

Mostly being built while live streaming on twitch at https://twitch.tv/superkevin627

• postgres code adapted from rluba/jai-postgres
• vendor/jai-socket is mirrored from smari/jai-socket
• vendor/uniform is mirrored from rluba/uniform
• byte_order.jai is adapted from rluba/jai-postgres