add support for choosing a pig for events

web/src/app/arrangementer/[slug]/page.tsx

@@ -53,7 +53,7 @@ export default async function Page({ params }: { params: { slug: string } }) {
           <Blocks blocks={event.body} />
         </section>
       </main>
-      <BgPig type="dance" color="white" />
+      {event.pig && <BgPig type={event.pig} color="white" />}
     </>
   );
 }