refactor: Replace Rollup with Vite (#2656)

This is a high risk change: every byte the card ships is emitted by a
different bundler, minified by a different minifier, and every
stylesheet is compiled by a different sass. The intent is that the
card's behaviour is unchanged.

**Significant development win**: Build time drops from 24s to 1.1s 🎉 

Also adds a test suite ('dist') that runs against the built bundle.

src/components/effects/heart.ts

@@ -7,7 +7,7 @@ import {
 } from 'lit';
 import { customElement, property } from 'lit/decorators.js';
 
-import heartStyle from '../../scss/heart.scss';
+import heartStyle from '../../scss/heart.scss?inline';
 
 @customElement('advanced-camera-card-heart')
 export class AdvancedCameraCardHeart extends LitElement {