create specification draft

[simontaurus]

Since OO-LD schema is a document format, W3C seems to be a better fit than IEFT , focussing on protocols

W3C template: https://w3c.github.io/tr-design/src/README
Example: https://json-ld.github.io/cbor-ld-spec/ / https://github.com/json-ld/cbor-ld-spec/

JSON-SCHEMA specs: https://json-schema.org/specification-links
JSON-LD spec: https://www.w3.org/TR/json-ld/
context: https://www.w3.org/TR/json-ld/#context-definitions

Draft: https://github.com/OO-LD/specification