feat: add short link to edit link response

Enhances link edit endpoint by including a fully-qualified short link URL in the response, constructed from request protocol and host alongside the slug

server/api/link/edit.put.ts

@@ -30,6 +30,7 @@ export default eventHandler(async (event) => {
       },
     })
     setResponseStatus(event, 201)
-    return { link: newLink }
+    const shortLink = `${getRequestProtocol(event)}://${getRequestHost(event)}/${link.slug}`
+    return { link: newLink, shortLink }
   }
 })