DEV: Refactor webauthn to support passkeys (1/3) (#23586)

This is part 1 of 3, split up of PR #23529. This PR refactors the
webauthn code to support passkey authentication/registration.

Passkeys aren't used yet, that is coming in PRs 2 and 3.

Co-authored-by: Alan Guo Xiang Tan <gxtan1990@gmail.com>

lib/discourse_webauthn.rb

@@ -1,8 +1,4 @@
 # frozen_string_literal: true
-require "webauthn/challenge_generator"
-require "webauthn/security_key_base_validation_service"
-require "webauthn/security_key_registration_service"
-require "webauthn/security_key_authentication_service"
 
 module DiscourseWebauthn
   ACCEPTABLE_REGISTRATION_TYPE = "webauthn.create"
@@ -22,6 +18,8 @@ module DiscourseWebauthn
   end
   class UserVerificationError < SecurityKeyError
   end
+  class UserPresenceError < SecurityKeyError
+  end
   class ChallengeMismatchError < SecurityKeyError
   end
   class InvalidTypeError < SecurityKeyError
@@ -34,7 +32,9 @@ module DiscourseWebauthn
   end
   class MalformedAttestationError < SecurityKeyError
   end
-  class NotFoundError < SecurityKeyError
+  class KeyNotFoundError < SecurityKeyError
+  end
+  class MalformedPublicKeyCredentialError < SecurityKeyError
   end
   class OwnershipError < SecurityKeyError
   end
@@ -68,7 +68,21 @@ module DiscourseWebauthn
   end
 
   def self.rp_id
-    Discourse.current_hostname
+    Rails.env.production? ? Discourse.current_hostname : "localhost"
+  end
+
+  def self.origin
+    case Rails.env
+    when "development"
+      # defaults to the Ember CLI local port
+      # you might need to change this and the rp_id above
+      # if you are using a non-default port/hostname locally
+      "http://localhost:4200"
+    when "test"
+      "http://localhost:3000"
+    else
+      Discourse.base_url
+    end
   end
 
   def self.rp_name