Add Hero element / header to app

src/lib/components/Hero.svelte

@@ -0,0 +1,14 @@
+<script lang="ts">
+  export let title: string;
+  export let text: string;
+  export let imageUrl: string;
+  export let imageAlt: string;
+</script>
+
+<div class="px-6 py-1 pb-10 sm:py-32 lg:px-8">
+  <div class="mx-auto max-w-2xl text-center">
+    <img class="mx-auto mb-6 w-32 h-32 lg:w-48 lg:h-48 rounded-full" src={imageUrl} alt={imageAlt} />
+    <h2 class="text-4xl lg:text-6xl font-bold tracking-tight text-gray-100 sm:text-6x1">{title}</h2>
+    <p class="mt-6 text-lg lg:text-xl leading-8 text-gray-300">{text}</p>
+  </div>
+</div>