This update adds an Emsigner integration that redirects people signing documents to the Emsigner portal when needed. It helps support external certificate-based signing flows directly from Odoo Sign, improving flexibility for businesses using Emsigner.

WIP

This change introduces and updates Dutch payroll configuration, including salary rules, payroll structures, contract settings, and 2025 rule parameters. It helps businesses prepare payroll calculations and declarations for employees in the Netherlands, with supporting tests and demo data.

-- DUMMY PR --