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/statusview.lua

@@ -34,6 +34,8 @@ local Object = require "core.object"
 ---@field hide_messages boolean
 local StatusView = View:extend()
 
+function StatusView:__tostring() return "StatusView" end
+
 ---Space separator
 ---@type string
 StatusView.separator  = "      "
@@ -72,6 +74,8 @@ StatusView.separator2 = "   |   "
 ---@field cached_item core.statusview.styledtext
 local StatusViewItem = Object:extend()
 
+function StatusViewItem:__tostring() return "StatusViewItem" end
+
 ---Available StatusViewItem options.
 ---@class core.statusview.item.options : table
 ---A condition to evaluate if the item should be displayed. If a string