[ADD] IR0 model and views are created. [ADD]Inherit credit.note.order --> new...

Merged Macarena Meldi requested to merge 12.0-stage-RAFC-78 into 12.0-stage

[ADD] IR0 model and views are created. [ADD]Inherit credit.note.order --> new fields: 'ir0_id', 'ir0_amount' and 'payment_order_ir0_id' (and its view)

Closes RAFC-78

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