[ADD] Payroll: Add United States Localization

closes #14614

Signed-off-by: Felicia Kuan (feku) <[email protected]>

Author: larm-odoo

content/applications/hr/employees/new_employee.rst

@@ -405,6 +405,8 @@ the information.
     Depending on the localization setting, other fields may be present. For example, for the United
     States, a :guilabel:`SSN No` (Social Security Number) field is present.
 
+.. _employees/private-contact:
+
 PRIVATE CONTACT
 ---------------
 

content/applications/hr/payroll/payroll_localizations.rst

@@ -93,7 +93,7 @@ Payroll localization modules are available for the countries listed below.
 - Switzerland
 - Türkiye
 - :doc:`United Arab Emirates <payroll_localizations/united_arab_emirates>`
-- United States
+- :doc:`United States <payroll_localizations/united_states>`
 
 .. toctree::
    :titlesonly:
@@ -104,4 +104,5 @@ Payroll localization modules are available for the countries listed below.
    payroll_localizations/hong_kong
    payroll_localizations/jordan
    payroll_localizations/united_arab_emirates
+   payroll_localizations/united_states
    payroll_localizations/employment_hero