feat: Social-Media-Badges für TikTok und Instagram hinzugefügt

- Neue RPC-Route für Social-Media-URLs aus .env (social.ts)
- Social-Media-Badges auf der Startseite mit attraktiven Buttons
- Social-Media-Icons im Footer aller Seiten
- Social-Media-Links in allen E-Mail-Templates
- URLs aus .env: TIKTOK_PROFILE und INSTAGRAM_PROFILE

src/server/rpc/index.ts

@@ -7,6 +7,7 @@ import { router as cancellation } from "./cancellation.js";
 import { router as legal } from "./legal.js";
 import { router as gallery } from "./gallery.js";
 import { router as reviews } from "./reviews.js";
+import { router as social } from "./social.js";
 
 export const router = {
   demo,
@@ -18,4 +19,5 @@ export const router = {
   legal,
   gallery,
   reviews,
+  social,
 };