Site model and new device model done

...ersions/2023-03-31_f4959f32c866_create_device_model.py.no

.../versions/2023-04-05_857225661207_add_device_workflows.py

...023-04-28_95cd21cb2b05_add_iptrunk_create_workflows.py.no

...ations/versions/2023-05-04_4d850df522f2_add_site_model.py

...ions/versions/2023-05-04_d52256e7d715_add_device_model.py

gso/products/__init__.py

gso/products/product_blocks/device.py

gso/products/product_blocks/site.py

gso/products/product_types/device.py

gso/workflows/__init__.py

gso/workflows/site/create_site.py