FEATURE: User Status API (#19149)

This adds API scope for the user status. This also adds a get method to the user status controller. We didn't need a dedicated method that returns status before because the server returns status with user objects, but I think we need to provide this method for API clients.

config/locales/client.en.yml

@@ -4518,6 +4518,9 @@ en:
               anonymize: Anonymize user accounts.
               delete: Delete user accounts.
               list: Get a list of users.
+            user_status:
+              read: Read user status.
+              update: Update user status.
             email:
               receive_emails: Combine this scope with the mail-receiver to process incoming emails.
             badges:

config/routes.rb

@@ -1037,6 +1037,7 @@ Discourse::Application.routes.draw do
     post "/presence/update" => "presence#update"
     get "/presence/get" => "presence#get"
 
+    get "user-status" => "user_status#get"
     put "user-status" => "user_status#set"
     delete "user-status" => "user_status#clear"