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/operations/get-site-info.ts

@@ -0,0 +1,46 @@
+import type { OperationContext } from '@commerce/api/operations'
+import type { Category, GetSiteInfoOperation } from '@commerce/types/site'
+
+import type { RawCategory } from '../../types/category'
+import type { OrdercloudConfig, Provider } from '../index'
+
+export type GetSiteInfoResult<
+  T extends { categories: any[]; brands: any[] } = {
+    categories: Category[]
+    brands: any[]
+  }
+> = T
+
+export default function getSiteInfoOperation({
+  commerce,
+}: OperationContext<Provider>) {
+  async function getSiteInfo<T extends GetSiteInfoOperation>({
+    config,
+  }: {
+    query?: string
+    variables?: any
+    config?: Partial<OrdercloudConfig>
+    preview?: boolean
+  } = {}): Promise<T['data']> {
+    // Get fetch from the config
+    const { restBuyerFetch } = commerce.getConfig(config)
+
+    // Get list of categories
+    const rawCategories: RawCategory[] = await restBuyerFetch<{
+      Items: RawCategory[]
+    }>('GET', `/me/categories`).then((response) => response.Items)
+
+    return {
+      // Normalize categories
+      categories: rawCategories.map((category) => ({
+        id: category.ID,
+        name: category.Name,
+        slug: category.ID,
+        path: `/${category.ID}`,
+      })),
+      brands: [],
+    }
+  }
+
+  return getSiteInfo
+}