refactor: convert to bun workspaces monorepo

- Move web app into apps/web/
- Create packages/shared/ with shared types
- Create plugins/decky-vault/ scaffold
- Root package.json manages workspaces only

apps/web/app/compare/layout.tsx

@@ -0,0 +1,12 @@
+import type { Metadata } from "next"
+
+export const metadata: Metadata = {
+    title: "Compare Games",
+    description:
+        "Compare Steam Deck game benchmarks side by side. See FPS, settings, and performance data across multiple titles on DeckyVault.",
+    alternates: { canonical: "https://deckyvault.xyz/compare" },
+}
+
+export default function CompareLayout({ children }: { children: React.ReactNode }) {
+    return children
+}