[IMP] doc: add link to tutorial in client actions reference doc

The doc for client actions is currently too minimalistic to be of much
use. This commit adds a seealso linking to the related tutorial.

task-2423824

closes odoo/odoo#63830

X-original-commit: 386e57cf
Signed-off-by: Victor Feyens (vfe) <vfe@odoo.com>
Signed-off-by: Antoine Vandevenne (anv) <AntoineVDV@users.noreply.github.com>