feat(inboxes): add inbox disable toggle

lib/custom_exceptions/inbox.rb

@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+class CustomExceptions::Inbox::Disabled < CustomExceptions::Base
+  def initialize(data = {})
+    super
+  end
+
+  def message
+    'This inbox is currently disabled'
+  end
+
+  def error_code
+    'inbox_disabled'
+  end
+
+  def http_status
+    :forbidden
+  end
+end