Initial commit: L10N_Americas packages

odoo-bringout-oca-ocb-l10n_mx/doc/MODELS.md

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+# Models
+
+Detected core models and extensions in l10n_mx.
+
+```mermaid
+classDiagram
+    class account_account
+    class account_chart_template
+    class account_tax
+    class account_tax_template
+    class res_bank
+    class res_config_settings
+    class res_partner_bank
+```
+
+Notes
+- Classes show model technical names; fields omitted for brevity.
+- Items listed under _inherit are extensions of existing models.