Add ordercloud provider (#500)

* Add ordercloud provider

* Fix provider errors

* Make submit checkout optional

* Make submit checkout optional

* Remove nullables when creating endpoint type

* Update readme

* Log checkout error

* Log error

* Save token to cookie

* Update fetch rest

* Use token at checkout

Co-authored-by: Luis Alvarez <luis@vercel.com>

framework/ordercloud/api/utils/fetch-graphql.ts

@@ -0,0 +1,14 @@
+import type { GraphQLFetcher } from '@commerce/api'
+import type { OrdercloudConfig } from '../'
+
+import { FetcherError } from '@commerce/utils/errors'
+
+const fetchGraphqlApi: (getConfig: () => OrdercloudConfig) => GraphQLFetcher =
+  () => async () => {
+    throw new FetcherError({
+      errors: [{ message: 'GraphQL fetch is not implemented' }],
+      status: 500,
+    })
+  }
+
+export default fetchGraphqlApi