feat: integrate Universal Design System with Web, Print, and Presentation examples

apps/example-presentation/src/App.tsx

@@ -0,0 +1,26 @@
+import React from 'react';
+import { Deck, Slide, Heading, Text as SpectacleText } from 'spectacle';
+import { Box, Text, EnvironmentProvider } from '@mintel/ui';
+
+function App() {
+  return (
+    <EnvironmentProvider env="presentation">
+      <Deck>
+        <Slide>
+          <Box className="flex flex-col items-center justify-center h-full">
+            <Heading>Mintel Universal Design System</Heading>
+            <SpectacleText>One Codebase. Web, Print, and Presentations.</SpectacleText>
+            
+            <Box className="mt-8 p-4 bg-mintel-primary rounded-xl shadow-xl">
+              <Text className="text-white text-xl">
+                This Box and Text comes directly from @mintel/ui!
+              </Text>
+            </Box>
+          </Box>
+        </Slide>
+      </Deck>
+    </EnvironmentProvider>
+  );
+}
+
+export default App;