Remove JSON encoding - use sys:JSON in WOQL

[GavinMendelGleason]

Currently we are using an encoding to embed JSONs in WOQL queries. With the advent of sys:JSON this is unnecessarily complex.

We should:

1. Make WOQL.doc a no-op, so as not to break client code.
2. Update the server to process raw JSON in documents.
3. Tell the community that version X of TerminusDB, has to go with version Y of client - especially important for TerminusX.