Move 7 IoT modules to oca-ocb-hw and 9 product modules to oca-product

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

odoo-bringout-oca-iot-iot_oca/doc/MODELS.md

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+# Models
+
+Detected core models and extensions in iot_oca.
+
+```mermaid
+classDiagram
+    class iot_communication_system
+    class iot_communication_system_action
+    class iot_device
+    class iot_device_action
+    class iot_device_group
+    class iot_device_tag
+    class image_mixin
+```
+
+Notes
+- Classes show model technical names; fields omitted for brevity.
+- Items listed under _inherit are extensions of existing models.