[Framework] PoS refactor for V16

[legalsylvain]

Hi all PoS developpers and @OCA/pos-maintainers

For your information, a pending PR is done against Odoo/master (future V16). The refactor is quite huge. (166 files changed)

Feel free to review it, comment, etc.. https://github.com/odoo/odoo/pull/82461

kind regards.

[ivantodorovich]

Thanks for the news! This is great, backbone was so outdated

[chienandalu]

Really big changes there :upside_down_face:

[legalsylvain]

Yes... porting modules to V16 will require works ! Hope pos framework will be stable in the futur.

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