Code challenge

[jhzzzz]

i have pre-created below items:

1. Color and Size attribute,
2. a product type named "Women's jackets"
3. navabar menu item "Fashion"
4. use a csv template import about 20 products into Shopify shop, each with some images

the code process order is:

1. get collection and product list from shopify shop
2. check to create color and size attribute values
3. create products, and variants
4. create collection
5. create a code challenge menu item under Fashion menu, link to the new collection created in step 4

to do:

1. improve the api speed, make it as a async task
2. data validation