added cypress tests and GitHub action configuration

.github/workflows/main.yml

@@ -0,0 +1,23 @@
+name: E2E on Chrome
+
+on: [push]
+
+jobs:
+  install:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Cypress run
+        uses: cypress-io/github-action@v6
+        with:
+          project: ./cypress
+          browser: chrome
+          build: pnpm build
+          start: pnpm start
+          wait-on: 'http://localhost:3000'
+        env:
+          COMMERCE_PROVIDER: ${{ secrets.COMMERCE_PROVIDER }}
+          NEXT_PUBLIC_SHOPIFY_STOREFRONT_ACCESS_TOKEN: ${{ secrets.NEXT_PUBLIC_SHOPIFY_STOREFRONT_ACCESS_TOKEN }}
+          NEXT_PUBLIC_SHOPIFY_STORE_DOMAIN: ${{ secrets.NEXT_PUBLIC_SHOPIFY_STORE_DOMAIN }}