feat: scaffold SvelteKit project with Tailwind, TypeScript, ESLint, Prettier

Initialize the llm-multiverse-ui project with:
- SvelteKit + Svelte 5 (runes mode enabled)
- Tailwind CSS v4 via @tailwindcss/vite plugin
- TypeScript strict mode
- ESLint 9 flat config with svelte and typescript-eslint plugins
- Prettier with svelte plugin
- Directory structure: src/lib/components/, src/lib/services/
- All required scripts: dev, build, preview, lint, format, check

Closes #1

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/routes/+layout.svelte

@@ -0,0 +1,12 @@
+<script lang="ts">
+	import favicon from '$lib/assets/favicon.svg';
+	import '../app.css';
+
+	let { children } = $props();
+</script>
+
+<svelte:head>
+	<link rel="icon" href={favicon} />
+</svelte:head>
+
+{@render children()}

src/routes/+page.svelte

@@ -0,0 +1,2 @@
+<h1 class="text-3xl font-bold text-center mt-8">LLM Multiverse UI</h1>
+<p class="text-center text-gray-600 mt-2">Orchestration interface</p>