Updated Saleor Provider (#356)

* Initial work, copied from the Shopify provider

* Added basis setup and type generation for the products queries

* refactor: adjust the types

* task: relax the Node.js constraint

* fix: page/product properties

* disable unknown fields

* mention Saleor in the README

* setup debugging for Next.js

* Check nextjs-commerce bug if no images are added for a product

* fix: client/server pecularities for env visibility

Must prefix with `NEXT_PUBLIC_` so that the API URL is
visible on the client

* re: make search work with Saleor API (WIP)

* task: update deps

* task: move to Webpack 5.x

* saleor: initial cart integration

* update deps

* saleor: shall the cart appear!

* task: remove deprecated packages

* saleor: adding/removing from the cart

* saleor: preliminary signup process

* saleor: fix the prices in the cart

* update deps

* update deps

* Added the options for a variant to the product page

* Mapped options to variants

* Mapped options to variants

* saleor: refine the auth process

* saleor: remove unused code

* saleor: handle customer find via refresh

temporary solution

* saleor: update deps

* saleor: fix the session handling

* saleor: fix the variants

* saleor: simplify the naming for GraphQL statements

* saleor: fix the type for collection

* saleor: arrange the error codes

* saleor: integrate collections

* saleor: fix product sorting

* saleor: set cookie location

* saleor: update the schema

* saleor: attach checkout to customer

* saleor: fix the checkout flow

* saleor: unify GraphQL naming approach

* task: update deps

* Add the env variables for saleor to the template

* task: prettier

* saleor: stub API for build/typescript compilation

thanks @cond0r

* task: temporarily disable for the `build`

* saleor: refactor GraphQL queries

* saleor: adjust the config

* task: update dependencies

* revert: Next.js to `10.0.9`

* saleor: fix the checkout fetch query

* task: update dependencies

* saleor: adapt for displaying featured products

* saleor: update the provider structure

* saleor: make the home page representable

* feature/cart: display the variant name (cond)

Co-authored-by: Patryk Zawadzki <patrys@room-303.com>
Co-authored-by: royderks <10717410+royderks@users.noreply.github.com>

framework/saleor/utils/get-vendors.ts

@@ -0,0 +1,41 @@
+import { SaleorConfig } from '../api'
+
+export type Brand = {
+  entityId: string
+  name: string
+  path: string
+}
+
+export type BrandEdge = {
+  node: Brand
+}
+
+export type Brands = BrandEdge[]
+
+// TODO: Find a way to get vendors from meta
+const getVendors = async (config: SaleorConfig): Promise<BrandEdge[]> => {
+  // const vendors = await fetchAllProducts({
+  //   config,
+  //   query: getAllProductVendors,
+  //   variables: {
+  //     first: 100,
+  //   },
+  // })
+
+  // let vendorsStrings = vendors.map(({ node: { vendor } }) => vendor)
+
+  // return [...new Set(vendorsStrings)].map((v) => {
+  //   const id = v.replace(/\s+/g, '-').toLowerCase()
+  //   return {
+  //     node: {
+  //       entityId: id,
+  //       name: v,
+  //       path: `brands/${id}`,
+  //     },
+  //   }
+  // })
+
+  return []
+}
+
+export default getVendors