Racking Bill of Materials API

Racking bill of materials can now be uploaded with the new Update Racking Bill of Materials endpoint as well as retrieved as part of the existing bill_of_materials field in the Retrieve Design Summary endpoint.

## PUT /tenants/{tenant_id}/designs/{design_id}/bill_of_materials/racking_components

{
  "bill_of_materials": [
    {
      "sku": "XR-1000-168A",
      "name": "XR1000, Rail 168” (14 Feet) Clear",
      "manufacturer_name": "IronRidge",
      "quantity": 9
    }
  ]
}