Adding test for expected boolean attribute support

Author: Rican7

packages/svelte/tests/runtime-runes/samples/attribute-boolean-case-insensitivity/_config.js

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+import { test } from '../../test';
+
+export default test({
+	html: `
+	<script nomodule async defer></script>
+	<form novalidate></form>
+	<input readonly required checked webkitdirectory>
+	<select multiple disabled></select>
+	<button formnovalidate></button>
+	<img ismap>
+	<video autoplay controls loop muted playsinline disablepictureinpicture disableremoteplayback></video>
+	<audio disableremoteplayback></audio>
+	<track default>
+	<iframe allowfullscreen></iframe>
+	<details open></details>
+	<ol reversed></ol>
+	<div autofocus></div>
+	<span inert></span>
+
+	<script nomodule async defer></script>
+	<form novalidate></form>
+	<input readonly required checked webkitdirectory>
+	<select multiple disabled></select>
+	<button formnovalidate></button>
+	<img ismap>
+	<video autoplay controls loop muted playsinline disablepictureinpicture disableremoteplayback></video>
+	<audio disableremoteplayback></audio>
+	<track default>
+	<iframe allowfullscreen></iframe>
+	<details open></details>
+	<ol reversed></ol>
+	<div autofocus></div>
+	<span inert></span>
+
+	<script></script>
+	<form></form>
+	<input>
+	<select></select>
+	<button></button>
+	<img>
+	<video></video>
+	<audio></audio>
+	<track>
+	<iframe></iframe>
+	<details></details>
+	<ol></ol>
+	<div></div>
+	<span></span>
+`
+});

packages/svelte/tests/runtime-runes/samples/attribute-boolean-case-insensitivity/main.svelte

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+<script>
+	let runesMode = $state('using a rune so that we trigger runes mode');
+
+	const attributeValues = [true, 'test', false];
+</script>
+
+{#each attributeValues as val}
+	<script NOMODULE={val} ASYNC={val} DEFER={val}></script>
+	<form NOVALIDATE={val}></form>
+	<input READONLY={val} REQUIRED={val} CHECKED={val} WEBKITDIRECTORY={val} />
+	<select MULTIPLE={val} DISABLED={val}></select>
+	<button FORMNOVALIDATE={val}></button>
+	<img ISMAP={val} />
+	<video AUTOPLAY={val} CONTROLS={val} LOOP={val} MUTED={val} PLAYSINLINE={val} DISABLEPICTUREINPICTURE={val} DISABLEREMOTEPLAYBACK={val}></video>
+	<audio DISABLEREMOTEPLAYBACK={val}></audio>
+	<track DEFAULT={val} />
+	<iframe ALLOWFULLSCREEN={val}></iframe>
+	<details OPEN={val}></details>
+	<ol REVERSED={val}></ol>
+	<div AUTOFOCUS={val}></div>
+	<span INERT={val}></span>
+{/each}