🎉 Support passing spec a JSON object

[macdonst]

Description

Enhances the OpenAPIBlock to be able to accept a spec object as well as a spec url.

Related Issue

n/a

Motivation and Context

Flexibility mostly. Having the spec in the project will enable it to be enhanced with things like code samples and will enable easier searching.

How Has This Been Tested?

I whipped through the specs at: https://github.com/OAI/OpenAPI-Specification/tree/master/examples

Passing them in as specUrl and spec.

Screenshots (if appropriate):

n/a the page looks the same regardless of the input.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.