refactor types, produce json schema from types

[CalebCourier]

Pull Request Type

• Feature
• Bug Fix

Link to Notion Task or Github Issue

https://www.notion.so/tinystacks/Widget-Create-Update-Improvements-a54c945ccf634d9b9b06cec0fb382487

Summary of Feature

1. Refactors types to isolate widget configuration properties from unrelated dependency types.
2. Use typescript-json-schema to generate json schema from typescript types.

Other details

Since we are often union-ing types to extend our ops-model concepts like Widget and Provider, the default json schemas produced from these use schema composition rather than merging. We can force it to merge down the schemas using a special flag, but even if we do this with our own types we need to be cognizant of being able to handle any valid JSON schema in any tools/code where we consume them.