This update adds comprehensive data for Joint Committees within Odoo Enterprise, addressing a previous issue where incorrect combinations of Joint Committee and Employer Category could lead to errors. The changes ensure accurate data encoding and provide a clearer system for managing these important employee details. This improves data integrity and reduces potential user errors.

In order to avoid encoding mistakes, we need to warn user if he encoded a wrong combination of Joint Committee and Employer Category (L10N Be Employer Category). So we need to have all the Joint Committee data encoded into out system
- Add all the missing committee
- update the committee display name

Task: 6018469

This update introduces a voicemail button within the Odoo softphone interface. When a VoIP provider is configured with a voicemail code, a button appears on the keypad, allowing users to easily access voicemail. This improves the user experience by providing a direct dialing option for voicemail services.

This commit allows the configuration of a voicemail code for VoIP providers. When a provider has a voicemail code configured, a voicemail icon is displayed on the "1" key. A long press on this key will dial the voicemail code.

Task-[5977620](https://www.odoo.com/odoo/5778/tasks/5977620)

This update allows users to create Documents records directly from files uploaded through employee forms. Previously, this feature was blocked for attachments with a specific field setting. This change improves the process of managing employee files within the Documents system, streamlining document creation and storage.

POC for comparison with #103818.

task-5454615