split notification listeners into separate files

src/utils/echo/listeners/userCreatedListener.js

@@ -0,0 +1,17 @@
+export const userCreatedListener = (echo, userData, setNotifications, setunreadNotification) => {
+    if (userData.isAdmin || userData.role === "Gérant") {
+        const channelName = "users.registration";
+        echo.private(channelName)
+            .listen(".users.registration", (event) => {
+                const newNotification = {
+                    id: Date.now(),
+                    content: `Nouvelle demande d'inscription : ${event.user.name} ${event.user.lastname}`,
+                    pivot: { unread: 1 }
+                };
+                setNotifications(prev => [newNotification, ...prev]);
+                setunreadNotification(true);
+            });
+        return channelName;
+    }
+    return null;
+};