[FEATURE] Demo the Interaction Code Grant

[RyAndrew]

Describe the solution you'd like
Okta has introduced an extension to the Oauth/OIDC Spec called the Interaction Code Grant.
The InteractionCode Grant relates to how client interactions (MFA challenges) are handled and can be customized client side.
https://developer.okta.com/docs/concepts/interaction-code/

Zartan should be able to demonstrate this interaction to the fullest extent.

Create a new vertical for this to demo the full capabilities of the Interaction Code Grant.