chore: 🤖 Port authenticate template from pre-scope template

ui/core/app/templates/scopes/scope/authenticate.hbs

@@ -1 +1,5 @@
-{{outlet}}
+<Rose::Layout::Centered>
+  <div id="authentication-view">
+    {{outlet}}
+  </div>
+</Rose::Layout::Centered>

ui/core/app/templates/scopes/scope/authenticate/index.hbs

@@ -1 +0,0 @@
-{{outlet}}

ui/core/app/templates/scopes/scope/authenticate/method.hbs

@@ -1,3 +1,29 @@
+{{#if @model}}
+  <h2>{{t 'actions.authenticate'}}</h2>
+  <p>{{t "auth.descriptions.choose-org"}}</p>
+  <Rose::Dropdown
+    @text={{t 'actions.choose-org'}}
+    @icon="user-organization"
+  as |dropdown|>
+    {{#each @model as |org|}}
+      <dropdown.link @route="orgs.org.authenticate" @model={{org}}>
+        {{org.displayName}}
+      </dropdown.link>
+    {{/each}}
+  </Rose::Dropdown>
+{{/if}}
+
+{{#unless @model}}
+  <Rose::Message
+    @title={{t "auth.titles.no-orgs"}}
+    @icon="alert-circle-outline"
+  as |message|>
+    <message.description>
+      {{t "auth.descriptions.no-orgs"}}
+    </message.description>
+  </Rose::Message>
+{{/unless}}
+
 <Rose::Form
   @onSubmit={{route-action "authenticate" (hash
     identification=this.identification

ui/core/translations/en-us.yaml

@@ -4,7 +4,21 @@ actions:
   dismiss: Dismiss
   save: Save
   help: Need help?
+  authenticate: Authenticate
   deauthenticate: Deauthenticate
+  choose-org: Choose Org
+  choose-different-org: Choose a Different Org
+auth:
+  titles:
+    no-orgs: No Organizations Available
+    no-methods: No Authentication Method
+  descriptions:
+    no-orgs: No organizations were found.  To authenticate, ask your administrator to create an organization and grant you access.
+    no-methods: No authentication methods were found for this organization.  Switch organizations and try again.
+    choose-org: Choose an organization to authenticate.
+    authenticating-with-org: "You're authenticating with {name}."
+  method-types:
+    password: Password
 resources:
   user: User
   users: Users
@@ -47,6 +61,8 @@ form:
     name: Name
     description: Description
     type: Type
+    identification: Username
+    password: Password
 errors:
   titles:
     unauthenticated-error: You are not signed in