fix(ci): add root package.json and GitHub Actions workflows

Create nextjs.yml

feat(packages): add workbox

feat(packages): add ucp

feat(packages): add adk-js

feat(packages): add shopify-marketplace-remix-app

feat(packages): add shopify-enterprise-dash

feat(packages): add next-offline

feat(packages): add zone-chan test suites

feat(packages): add js-sdk, appqbeast, shopify-partner-api-demo, shp-zone-test, testing-demo

docs: add API documentation and demo files

feat: add test reports and results

feat: add comprehensive test framework

feat: add core API integration test suite