Add native cookie consent and move hero intro above CTA

- Restore CookieConsent banner behavior with the new dependency
- Reposition the right-panel intro above the Projekt anfragen button
- Add focused tests and update build metadata

src/lib/cookie-banner-info.ts

@@ -0,0 +1,38 @@
+import { run } from "vanilla-cookieconsent";
+import "vanilla-cookieconsent/dist/cookieconsent.css";
+
+const bannerText =
+  "Diese Website setzt keine Cookies. Wir erfassen ausschließlich anonymisierte Analytics-Daten, die keinen Rückschluss auf einzelne Nutzer zulassen.";
+
+export function initCookieInfoBanner(): void {
+  if (typeof globalThis.window === "undefined") return;
+
+  void run({
+    hideFromBots: false,
+    categories: {
+      necessary: {
+        enabled: true,
+        readOnly: true,
+      },
+    },
+    cookie: {
+      name: "cc_notice",
+      useLocalStorage: true,
+      expiresAfterDays: 365,
+    },
+    language: {
+      default: "de",
+      translations: {
+        de: {
+          consentModal: {
+            title: "Datenschutzhinweis",
+            description: bannerText,
+            acceptNecessaryBtn: "Verstanden",
+          },
+        },
+      },
+    },
+  }).catch((err) => {
+    console.error("[CookieBanner]", err);
+  });
+}