Adding a custom Polaris Modal inside Admin
My friend has built out a storefront using the Shopify Admin interface. He'd like to add a button to their storefront that launches a modal component. As the developer, I'd like to write the modal component using Shopify Polaris.
What's the best way to add this button to the page? Is this an "Embedded App"? It's unclear from the documentation whether this is possible with a Shopify Storefront, or whether I'd need to rewrite the UI from scratch and host the site on a different platform.