* Fix error during listing sheets with diagram only
* added PR number
* fixed formatting
* add dummy test
* added filter for grid sheets, added SAT tests.
* added new GOOGLE_SHEETS_TESTS_CREDS env
* fixed formatting
Template generation for new Source using the Santa CDK - provide basic scaffolding for someone implementing a new source.
General approach is to buff up comments in the original SDK, and add TODOs with secondary comments in the generated stub methods, as well as links to existing examples (e.g. Stripe or ExchangeRate api) users can look at.
Checked in and added tests for the generated modules.
