In addition to "use", "continue", "signin" and "signup", consider adding "pay" or "checkout"

[samuelgoto]

Posting this on behalf of a developer request, some use cases don't quite fit within the existing values of the RP's Context for use cases where the user is going through a e-commerce checkout flow:

https://fedidcg.github.io/FedCM/#enumdef-identitycredentialrequestoptionscontext

Which currently have:

enum IdentityCredentialRequestOptionsContext {
  "signin",
  "signup",
  "use",
  "continue"
};

The proposal is to add "pay" and/or "checkout" to this list.