Point of Sale-related code files were reorganized so similar internal helper files are grouped together in a dedicated folder. This does not change customer-facing behavior, but it should make future maintenance and updates easier for development teams.

Reorganization of all `hook` files into a specific folder.

task-id: 4290514

This update removes obsolete module markers from JavaScript files across accounting-related screens and tests. It does not change business functionality, but keeps the codebase cleaner and easier to maintain for future updates.

see related PR https://github.com/odoo/odoo/pull/186147