feat: Add coming soon components

Author: kss2002

apps/landing/src/components/ComingSoon.tsx

@@ -0,0 +1,25 @@
+import { Box, Text, VStack } from '@devup-ui/react'
+
+export const ComingSoon = () => {
+  return (
+    <Box
+      bg="$cardBg"
+      borderRadius="12px"
+      p="40px"
+      textAlign="center"
+      width="100%"
+    >
+      <VStack alignItems="center" gap="12px">
+        <Text color="$textSecondary" fontSize="32px">
+          🚧
+        </Text>
+        <Text color="$title" typography="h6">
+          Coming Soon
+        </Text>
+        <Text color="$textSecondary" typography="body">
+          This section is currently under construction.
+        </Text>
+      </VStack>
+    </Box>
+  )
+}