feat: initialize k-tv-frontend with Next.js and Tailwind CSS

- Added package.json with dependencies and scripts for development, build, and linting.
- Created postcss.config.mjs for Tailwind CSS integration.
- Added SVG assets for UI components including file, globe, next, vercel, and window icons.
- Configured TypeScript with tsconfig.json for strict type checking and module resolution.

k-tv-frontend/app/(main)/docs/page.tsx

@@ -0,0 +1,8 @@
+export default function DocsPage() {
+  return (
+    <div className="flex flex-1 flex-col items-center justify-center gap-4 p-8">
+      <h1 className="text-2xl font-semibold tracking-tight">Docs</h1>
+      <p className="text-sm text-zinc-500">API reference and usage documentation go here.</p>
+    </div>
+  );
+}