✨ add a <Tip/> component and use it

src/components/layout/Tip.tsx

@@ -0,0 +1,19 @@
+import { Text } from '@mantine/core';
+
+interface TipProps {
+  children: React.ReactNode;
+}
+
+export default function Tip(props: TipProps) {
+  return (
+    <Text
+      style={{
+        fontSize: '0.75rem',
+        color: 'gray',
+        marginBottom: '0.5rem',
+      }}
+    >
+      Tip: {props.children}
+    </Text>
+  );
+}