Add initial project setup with static files and configuration

- Create robots.txt to allow all user agents and specify sitemap location
- Add site.webmanifest for PWA support with app details
- Initialize sitemap.xml with the homepage URL and metadata
- Set up svelte.config.js for SvelteKit with static adapter and prerendering
- Configure TypeScript with tsconfig.json for strict type checking and module resolution
- Establish Vite configuration in vite.config.ts for SvelteKit integration

static/favicon.svg

@@ -0,0 +1,6 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64" role="img" aria-label="Squiggleverse">
+  <rect width="64" height="64" rx="14" fill="#160030" />
+  <path d="M15 34c0-10 7-18 17-18 8 0 14 5 14 12 0 8-6 13-14 13h-4" fill="none" stroke="#f1e7ff" stroke-width="7" stroke-linecap="round" />
+  <circle cx="44" cy="18" r="4" fill="#43d8ff" />
+  <circle cx="21" cy="48" r="4" fill="#b58cff" />
+</svg>