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/plugins/projectsearch.lua

@@ -9,6 +9,8 @@ local View = require "core.view"
 ---@class plugins.projectsearch.resultsview : core.view
 local ResultsView = View:extend()
 
+function ResultsView:__tostring() return "ResultsView" end
+
 ResultsView.context = "session"
 
 function ResultsView:new(path, text, fn)
@@ -237,7 +239,6 @@ function ResultsView:draw()
   self:draw_scrollbar()
 end
 
-
 ---@param path string
 ---@param text string
 ---@param fn fun(line_text:string):...