Update Add API wizard

[bajiat]

Update Add API wizard to add an API without proxy settings. (Proxy should be added - or in the future selected - in separate UI.) This UI will add an API with basic details to Catalog.

Definition of done

• User can enter all details related purely to API backend such as name, description, base URL with Add API wizard
  • Add API wizard does not contain any details or settings related to proxy or selecting proxy
• When user presses Publish API backend, the API will be added to API backends collection
  • User get redirected to single API view for the newly created API

[Nazarah]

@bajiat : need wireframe for this?

[jykae]

Discussed with @brylie about deprecating wizard and using simple form approach.

Base for the form will be new API Backend schema.
Fields for API backend schema:

• name
• description
• base URL for API
• isPublic checkbox