[ADD] Payroll: adding new configuration doc

closes #4249

Signed-off-by: Zachary Straub (zst) <[email protected]>

Author: larm-odoo

content/applications/hr.rst

@@ -8,3 +8,4 @@ Human resources
 
    hr/attendances
    hr/employees
+   hr/payroll

content/applications/hr/payroll.rst

@@ -0,0 +1,18 @@
+:nosearch:
+:show-content:
+:hide-page-toc:
+:show-toc:
+
+=======
+Payroll
+=======
+
+**Odoo Payroll** generates payslips for all employees based on timeseets and various salary rules.
+
+.. seealso::
+   `Odoo Tutorials: Payroll <https://www.odoo.com/slides/slide/manage-payroll-1002>`_
+
+.. toctree::
+   :titlesonly:
+
+   payroll/configuration