docs: Add note recommending grid over pack in tkinter documentation

Add a note at the beginning of 'The Packer' section to recommend using
grid geometry manager over pack for new code, as grid is easier to use
and helps create more appealing layouts.

Fixes #93501

Author: zlq500

Doc/library/tkinter.rst

@@ -637,6 +637,11 @@ The Packer
 
 .. index:: single: packing (widgets)
 
+.. note::
+   For new code, using the :meth:`grid` geometry manager is recommended over
+   :meth:`pack`. While :meth:`pack` is equally powerful, :meth:`grid` is easier
+   to use and makes it less onerous to create layouts that look appealing.
+
 The packer is one of Tk's geometry-management mechanisms.    Geometry managers
 are used to specify the relative positioning of widgets within their container.
 In contrast to the more cumbersome *placer* (which is