Add table row writer(s) + better selector(s) in the CLI

[matoszz]

Today the json output works but as we grow in objects it would be convenient to:

• have a table row writer for cleaner output
• cap the results returned and offer finer grained searching / filtering in the CLI via command flags or similar
• create a selector interface to navigate between returned results of a query in the CLI
• make the CLI more prompt oriented instead of things like generic UNIQUE constraints returned from the commands (e.g. it should say "username already exists" vs. some random SQL / graphql error