A new integration lets users create employee expenses directly from documents and generate documents from expense records. This helps teams connect receipts and supporting files with expense workflows, reducing manual handling and making expense documentation easier to manage.

This commit adds the bridge `documents_hr_expense`,
it requires `documents` and `documents_hr`. It adds the ability to create
an expense from the actions of documents, and to generate documents from
`hr.expense`.

Task: 2122739