(config-scaffold 2/n) Add scaffold config button to Dagit playground
This diff adds a "scaffold missing config" button to Dagit, which is inspired by the scaffold CLI command. It does the scaffolding client side based on the config schema.
There are a few choices here that are debatable. I've highlighted them in the comments. Open to feedback about how to handle them.
Created solid and resource with every possible config type. Checked to make sure scaffolded config was correct.
Differential Revision: https://dagster.phacility.com/D4808