feat: add @radix-ui/react-dialog dependency and implement dialog component

- Added @radix-ui/react-dialog to dependencies in package.json and bun.lock.
- Updated page.tsx to replace placeholder text with "We are in MAGICALWORLD!".
- Refactored SUPERCOMMAND component to handle key sequences and show dialog on match.
- Implemented Dialog component with header, footer, and description using Radix UI primitives.

package.json

@@ -13,6 +13,7 @@
   "dependencies": {
     "@hookform/resolvers": "^4.1.0",
     "@radix-ui/react-accordion": "^1.2.10",
+    "@radix-ui/react-dialog": "^1.1.15",
     "@radix-ui/react-label": "^2.1.2",
     "@radix-ui/react-select": "^2.1.6",
     "@radix-ui/react-slot": "^1.1.2",