feat: add tuple implementation for IntoHandler

zenoh/src/api/handlers/callback.rs

@@ -36,6 +36,25 @@ where
     }
 }
 
+impl<'a, T, F, H> IntoHandler<'a, T> for (F, H)
+where
+    F: Fn(T) + Send + Sync + 'a,
+{
+    type Handler = H;
+
+    fn into_handler(self) -> (Callback<'a, T>, Self::Handler) {
+        (Dyn::from(self.0), self.1)
+    }
+}
+
+impl<'a, T, H> IntoHandler<'a, T> for (Callback<'static, T>, H) {
+    type Handler = H;
+
+    fn into_handler(self) -> (Callback<'a, T>, Self::Handler) {
+        self
+    }
+}
+
 impl<T: Send + 'static> IntoHandler<'static, T> for (flume::Sender<T>, flume::Receiver<T>) {
     type Handler = flume::Receiver<T>;