galipalli/intershop-pwa — reverse-engineered prompt

I want you to build me a progressive web storefront for the Intershop Commerce Platform, similar to the public Intershop PWA demo. It should feel like a real online shop that works well on phones and desktop, loads quickly, and can be installed like an app.

Shoppers should be able to browse the store, view product details, move through the buying flow, and use a clean home page that a business could customize later. Please use Angular since this needs to fit the Intershop PWA style, and keep the setup practical so I can run it locally, test it, and package it for deployment.

If there are existing Intershop APIs or setup steps, wire the app so those can be configured without digging through code. Please include sensible sample content or placeholders where a live backend is not available. Look up the current Intershop PWA docs online if you need to, then implement the app end to end.