feat: add Datenschutzerklärung and Konto löschen pages

- Created datenschutz.vue for the privacy policy with sections on data protection, responsible entity, data processing, rights, and contact information.
- Created konto-loeschen.vue for account deletion requests, detailing the process, affected data, and processing time.
- Added anonymize-playstore-screenshot.sh script for image anonymization using ImageMagick.
- Introduced playstore-assets.mjs for generating Play Store assets, including icons and feature graphics, using sharp.
- Added playstore-assets.sh script to execute the asset generation script.

components/Footer.vue

@@ -19,6 +19,18 @@
           >
             Impressum
           </NuxtLink>
+          <NuxtLink
+            to="/datenschutz"
+            class="text-gray-400 hover:text-primary-400 transition-colors"
+          >
+            Datenschutz
+          </NuxtLink>
+          <NuxtLink
+            to="/konto-loeschen"
+            class="text-gray-400 hover:text-primary-400 transition-colors"
+          >
+            Konto loeschen
+          </NuxtLink>
           <NuxtLink
             to="/kontakt"
             class="text-gray-400 hover:text-primary-400 transition-colors"