Add oca-dms submodule with 10 DMS modules

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

odoo-bringout-oca-dms-dms_field/doc/MODELS.md

@@ -0,0 +1,20 @@
+# Models
+
+Detected core models and extensions in dms_field.
+
+```mermaid
+classDiagram
+    class dms_field_mixin
+    class dms_field_template
+    class res_partner
+    class dms_access_group
+    class dms_directory
+    class dms_field_mixin
+    class dms_storage
+    class ir_actions_act_window_view
+    class ir_ui_view
+```
+
+Notes
+- Classes show model technical names; fields omitted for brevity.
+- Items listed under _inherit are extensions of existing models.