Add Shopify package

[lemonmade]

Goals

• Storefront example
• Admin app example
• GraphQL utilities
• Small enough for any perf budget
• Simple extensions on native Quilt features

Tasks

• Add GraphQL schema types to Shopify package #89

[lemonmade]

https://github.com/Shopify/shopify-app-template-remix

https://github.com/Shopify/hydrogen/blob/2023-07/templates/TEMPLATE_GUIDELINES.md

Tried to recreate the OAuth flow by hand but it was very hard to follow: https://github.com/Shopify/shopify-api-js/tree/main/packages/shopify-api/lib/auth

[lemonmade]

Storefront comparisons:

https://shop.astro.build/ (repo: https://github.com/withastro/storefront)