InstanceView: Add chat limit, description limit

lib/pleroma/web/mastodon_api/views/instance_view.ex

@@ -34,6 +34,8 @@ def render("show.json", _) do
       background_upload_limit: Keyword.get(instance, :background_upload_limit),
       banner_upload_limit: Keyword.get(instance, :banner_upload_limit),
       background_image: Keyword.get(instance, :background_image),
+      chat_limit: Keyword.get(instance, :chat_limit),
+      description_limit: Keyword.get(instance, :description_limit),
       pleroma: %{
         metadata: %{
           account_activation_required: Keyword.get(instance, :account_activation_required),

test/web/mastodon_api/controllers/instance_controller_test.exs

@@ -32,7 +32,9 @@ test "get instance information", %{conn: conn} do
              "avatar_upload_limit" => _,
              "background_upload_limit" => _,
              "banner_upload_limit" => _,
-             "background_image" => _
+             "background_image" => _,
+             "chat_limit" => _,
+             "description_limit" => _
            } = result
 
     assert result["pleroma"]["metadata"]["account_activation_required"] != nil