Previously for `appointment`, now for `appointment_hr`, the computation of users' availability for appointment slots can be dependent on that person's work schedule if: * The user is linked to an employee * The user's employee has working hours defined (resource calendar) This commit provides working hours to all employees and a user to some, within a multi-company setup. Task-2728093 See odoo/enterprise#22642 closes odoo/odoo#80688 Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>