Add user application API for timesheet
As discussed at https://discuss.tryton.org/t/support-user-application/183
This instance will be upgraded to Heptapod 1.3.3 (GitLab 16.9.6) on 2023-04-25 at 18:00 UTC+2
As discussed at https://discuss.tryton.org/t/support-user-application/183