[Data]ability to review dataset schema and bulk 'register' datasets

[junlincc]

Feature Request: I wish I could easily see all of the tables in a schema for a given database (and ideally be able to ‘register’ like 10 or 20 datasets at a time). Exploring tables and finding ideas for analysis, charts, and dashboards is very challenging right now. The workflow we push people to is to add individual datasets, which isn’t conducive to exploration or discovery.
Persona Affected: Data Analysts ore Explorer.
Really anyone looking to play with data loaded by ‘someone else’ and there’s no documentation for this data.

@srinify @betodealmeida @yousoph