Simplify authzed testing: schema outputting and sample data

[JAORMX]

Currently, it's non-trivial to test the authzed schema without doing several manual tests. In order to on-board developers into working with permissions-api, it would be ideal to have a small and simple tool that would output the schema in a format that's ready-to use (this simply replaces the prefix). It would also be ideal for us to provide up-to-date data for us to paste in the relationships tab so folks can play around with the schema.