This update strengthens quality checks for the self-ordering point-of-sale experience by adding automated test coverage for key screens, data models, and service behavior. It also reorganizes some internal test setup so future changes can be validated more safely and with fewer naming conflicts.

- Isolated `printer` service into a standalone file to avoid naming conflicts with `point_of_sale` during tests.
- Introduced `setupSelfPosEnv` to mock and bootstrap the self-order testing environment.
- Add Hoot test coverage for core components, models, and service logic

Task-4945633

Forward-Port-Of: odoo/odoo#220537

This update improves the internal test tools used for the website editor so tests wait for the sidebar to finish loading and updating before continuing. This helps reduce flaky test results and gives teams more confidence that website builder changes are validated reliably.

We need a helper to wait enough