fix: support multiple clients in lsp code actions (#722)

* fix: support multiple clients in lsp code actions

* no goto

* reduce diff a bit

* use displayer, also include lsp client name for each entry

* review comments

lua/telescope/utils.lua

@@ -259,13 +259,14 @@ utils.strdisplaywidth = (function()
 
     return function(str, col)
       local startcol = col or 0
+      str = tostring(str)
       local s = ffi.new('char[?]', #str + 1)
       ffi.copy(s, str)
       return ffi.C.linetabsize_col(startcol, s) - startcol
     end
   else
     return function(str, col)
-      return #str - (col or 0)
+      return #(tostring(str)) - (col or 0)
     end
   end
 end)()