feat: Use display_name instead of name of the agent (#1097)

* feat: Use display_name instead of name of the agent

app/views/api/v1/models/_agent.json.jbuilder

@@ -2,6 +2,7 @@ json.account_id resource.account.id
 json.availability_status resource.availability_status
 json.confirmed resource.confirmed?
 json.email resource.email
+json.available_name resource.available_name
 json.id resource.id
 json.name resource.name
 json.role resource.role

app/views/api/v1/models/_user.json.jbuilder

@@ -3,6 +3,7 @@ json.provider resource.provider
 json.uid resource.uid
 json.name resource.name
 json.display_name resource.display_name
+json.available_name resource.available_name
 json.email resource.email
 json.account_id resource.active_account_user&.account_id
 json.pubsub_token resource.pubsub_token