feat: tiebreak config function (#1401)

Co-authored-by: Simon Hauser <Simon-Hauser@outlook.de>

lua/telescope/config.lua

@@ -153,6 +153,25 @@ append(
   - "ascending"]]
 )
 
+append(
+  "tiebreak",
+  function(current_entry, existing_entry, _)
+    return #current_entry.ordinal < #existing_entry.ordinal
+  end,
+  [[
+  A function that determines how to break a tie when two entries have
+  the same score.
+  Having a function that always returns false would keep the entries in
+  the order they are found, so existing_entry before current_entry.
+  Vice versa always returning true would place the current_entry
+  before the existing_entry.
+
+  Signature: function(current_entry, existing_entry, prompt) -> boolean
+
+  Default: function that breaks the tie based on the length of the
+           entry's ordinal]]
+)
+
 append(
   "selection_strategy",
   "reset",