Added switch, LAN switch interconnect and pop VLAN products.

...8_2adf833f02a7_add_switch_lan_switch_interconnect_and_.py

gso/products/__init__.py

gso/products/product_blocks/lan_switch_interconnect.py

gso/products/product_blocks/pop_vlan.py

gso/products/product_blocks/switch.py

gso/products/product_types/lan_switch_interconnect.py

gso/products/product_types/pop_vlan.py

gso/products/product_types/switch.py