[IMP]product : public category should be come in hierarcy, improve and c...

...lean in internal and public category in demo data,

[IMP]point_of_sale : Improve and clean category in point of sale demo data

Task: https://www.odoo.com/web#id=10181&view_type=form&model=project.task&menu_id=3942&action=327
PR: https://pad.odoo.com/p/r.KkU1IuIGEH4qWcNf