Remove deprecated components from the project

- Delete unused components including About19, Contact21, CTA, Faq7, Feature284, Hero235, Landing, Pricing4, Stats11, and Accordion.
- Clean up the codebase by removing unnecessary files to improve maintainability and reduce clutter.
- Ensure that the removal of these components does not affect the existing functionality of the application.

src/components/landing/services-section.tsx

@@ -0,0 +1,55 @@
+const services = [
+  {
+    number: "01",
+    title: "Website",
+    text: "Eine klare Startseite oder ein kompletter Auftritt, der sofort zeigt, warum man Ihnen vertrauen kann.",
+  },
+  {
+    number: "02",
+    title: "Struktur",
+    text: "Angebot, Referenzen, Ablauf und Kontakt werden so sortiert, dass Besucher nicht suchen müssen.",
+  },
+  {
+    number: "03",
+    title: "Technik",
+    text: "Schnell, mobil sauber, DSGVO-sauber und so gebaut, dass spätere Änderungen nicht zum Projekt werden.",
+  },
+];
+
+const ServicesSection = () => {
+  return (
+    <section
+      id="leistungen"
+      className="grid border-b border-border lg:grid-cols-[0.36fr_0.64fr]"
+    >
+      <div className="border-b border-border px-5 py-12 sm:px-8 lg:border-b-0 lg:border-r lg:px-12 lg:py-20">
+        <p className="text-sm uppercase tracking-[0.3em] text-primary">
+          Leistungen (02)
+        </p>
+        <h2 className="mt-6 max-w-[9ch] text-5xl font-black uppercase leading-[0.86] sm:text-7xl">
+          Drei Schritte. Eine Website.
+        </h2>
+      </div>
+      <div className="divide-y divide-border">
+        {services.map((service) => (
+          <article
+            key={service.number}
+            className="grid gap-8 px-5 py-10 sm:px-8 md:grid-cols-[7rem_0.4fr_1fr] lg:px-12"
+          >
+            <span className="text-5xl font-black text-primary">
+              {service.number}
+            </span>
+            <h3 className="text-3xl font-black uppercase leading-none">
+              {service.title}
+            </h3>
+            <p className="max-w-2xl text-lg leading-8 text-muted-foreground">
+              {service.text}
+            </p>
+          </article>
+        ))}
+      </div>
+    </section>
+  );
+};
+
+export { ServicesSection };