feat: adding hero title placeholder

Author: alexshyba

examples/nextjs-starter/components/Hero.tsx

@@ -12,8 +12,18 @@ type HeroProps = ComponentProps<{
 
 const Hero: React.FC<HeroProps> = () => (
   <div>
-    <UniformText className="title" parameterId="title" as="h1" data-test-id="hero-title"/>
-    <UniformRichText parameterId="description" className="description" data-test-id="hero-description"/>
+    <UniformText
+      className="title"
+      parameterId="title"
+      as="h1"
+      data-test-id="hero-title"
+      placeholder="Hero title goes here"
+    />
+    <UniformRichText
+      parameterId="description"
+      className="description"
+      data-test-id="hero-description"
+    />
   </div>
 );