The Documents Spreadsheet area now uses the newer filter/domain selection interface instead of the older widget. This keeps the experience more consistent with the rest of Odoo and should make future maintenance easier without changing core business workflows.

Use the new domain selector component instead of the legacy widget

Spreadsheet features are being reorganized so they no longer rely directly on the Documents app. This prepares Odoo to manage spreadsheets more independently in the future while keeping current collaboration and revision features structurally cleaner.

This PR is a step to split the `documents_spreadsheet` module in two.
All spreadsheet related code and models will be moved to a new module which
won't depend on the `documents` module.

In this commit we remove the dependency between the `documents.document` model and
- `spreadsheet.revision` model
- collaborative bus/channel