feat(SEO, Sitemap, Routing): enhance SEO and sitemap for new features

- Updated update-sitemap.sh to include new URLs for Vereinssoftware, Mitgliederverwaltung, Trainingsplanung, and Turniersoftware with appropriate lastmod dates and change frequencies.
- Enhanced server.js and seo.js with SEO configurations for the new pages, ensuring proper indexing and descriptions.
- Added new routes in router.js for the additional features, improving navigation and user access.
- Updated Home.vue to include links to the new features, enhancing user engagement and visibility.

update-sitemap.sh

@@ -18,6 +18,10 @@ echo "Aktualisiere lastmod-Datum auf: $TODAY"
 URLS=(
   "https://tt-tagebuch.de/"
   "https://tt-tagebuch.de/impressum"
+  "https://tt-tagebuch.de/vereinssoftware-tischtennis"
+  "https://tt-tagebuch.de/mitgliederverwaltung-verein"
+  "https://tt-tagebuch.de/trainingsplanung-tischtennis"
+  "https://tt-tagebuch.de/turniersoftware-tischtennis"
   "https://tt-tagebuch.de/datenschutz"
 )
 
@@ -42,6 +46,30 @@ cat > "$SITEMAP_FILE" <<EOF
   <url>
     <loc>${URLS[2]}</loc>
     <lastmod>${TODAY}</lastmod>
+    <changefreq>monthly</changefreq>
+    <priority>0.8</priority>
+  </url>
+  <url>
+    <loc>${URLS[3]}</loc>
+    <lastmod>${TODAY}</lastmod>
+    <changefreq>monthly</changefreq>
+    <priority>0.8</priority>
+  </url>
+  <url>
+    <loc>${URLS[4]}</loc>
+    <lastmod>${TODAY}</lastmod>
+    <changefreq>monthly</changefreq>
+    <priority>0.8</priority>
+  </url>
+  <url>
+    <loc>${URLS[5]}</loc>
+    <lastmod>${TODAY}</lastmod>
+    <changefreq>monthly</changefreq>
+    <priority>0.8</priority>
+  </url>
+  <url>
+    <loc>${URLS[6]}</loc>
+    <lastmod>${TODAY}</lastmod>
     <changefreq>yearly</changefreq>
     <priority>0.3</priority>
   </url>