odoo
[IMP] portal: Add country and state validation
Description of the issue/feature this PR addresses:
Currently, there is no validation ensuring the selected state corresponds to the chosen country, nor checks that enforce a state selection when required by the country. Current behavior before PR:
Users can select a state that doesn't belong to the selected country. No validation exists to require a state selection when the country mandates it. Desired behavior after PR is merged:
The selected state will be validated to ensure it belongs to the selected country. A state will be mandatory when the country requires it, and appropriate error messages will be shown when these conditions are not met.
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