Initial commit: OCA Payroll packages (5 packages)

odoo-bringout-oca-payroll-payroll/doc/MODELS.md

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+# Models
+
+Detected core models and extensions in payroll.
+
+```mermaid
+classDiagram
+    class hr_contribution_register
+    class hr_payroll_structure
+    class hr_payslip
+    class hr_payslip_input
+    class hr_payslip_line
+    class hr_payslip_run
+    class hr_payslip_worked_days
+    class hr_rule_input
+    class hr_salary_rule
+    class hr_salary_rule_category
+    class hr_contract
+    class hr_employee
+    class hr_leave_type
+    class hr_salary_rule
+    class res_config_settings
+```
+
+Notes
+- Classes show model technical names; fields omitted for brevity.
+- Items listed under _inherit are extensions of existing models.