feat: add AboutPage and AboutContent component; integrate AnnouncementBar in layout

app/page.tsx

@@ -1,29 +1,9 @@
-import { Icon } from "@iconify/react";
-import Link from "next/link";
-import { AnnouncementBar } from "poyraz-ui/organisms";
 import { HomeHero } from "@/components/home-hero";
 import { ReferencesSection } from "@/components/references-section";
 
 export default function Home() {
   return (
     <section className="flex h-full flex-col gap-4 overflow-hidden">
-      <AnnouncementBar
-        variant="branded"
-        icon={<Icon icon="mdi:sparkles" width={16} height={16} />}
-        action={
-          <Link
-            href="https://ui.poyrazavsever.com"
-            target="_blank"
-            rel="noreferrer"
-            className="text-xs font-bold underline"
-          >
-            Learn More -&gt;
-          </Link>
-        }
-      >
-        New components added this week!
-      </AnnouncementBar>
-
       <HomeHero />
       <ReferencesSection />
     </section>