I'm simply trying to import the <https://shoelace.style/> library for use within an Angular app.

I've tried both their recommended method of adding `style` and `link` elements into the index file, and I've also tried adding their NPM package and then adding the following to my `angular.json`

```
"styles": [
              "src/styles.scss",
              "node_modules/@shoelace-style/shoelace/dist/themes/base.css"
            ],
            "scripts": [
              "node_modules/@shoelace-style/shoelace/dist/shoelace.js"
            ],

```

However no matter what I do, whenever I try to use a particular Shoelace component such as `<sl-button>` I get `'sl-button' is not a known element`

What do I need to do to get this working?