add a __tostring method to every object (#1534)

* added a stupid __tostring to every object

* moved every __tostring to just after the :extend() call

---------

Co-authored-by: Adam <adamdharrison@gmail.com>
(cherry picked from commit 880e7f1fa1521cdf176f44627a27c901e187058e)

data/core/nagview.lua

@@ -15,6 +15,8 @@ local noop = function() end
 ---@field super core.view
 local NagView = View:extend()
 
+function NagView:__tostring() return "NagView" end
+
 function NagView:new()
   NagView.super.new(self)
   self.size.y = 0