Support custom Authorization schemes under securitySchemes

[Mahoney]

We use a custom Authorization scheme of Token - so header looks like this:
Authorization: Token <apiKey>

At present if we configure our OpenAPI as so:

security:
  - tokenAuth: []

components:
  securitySchemes:
    tokenAuth:
      type: http
      scheme: Token
      description: Your API key prefixed by 'Token '

Mintlify does not render anything around auth in the generated docs.