feat: provide deprecated create_rw_signal (#2824)

reactive_graph/src/signal.rs

@@ -175,3 +175,14 @@ pub fn create_signal<T: Send + Sync + 'static>(
 ) -> (ReadSignal<T>, WriteSignal<T>) {
     signal(value)
 }
+
+/// Creates a reactive signal with the getter and setter unified in one value.
+#[inline(always)]
+#[track_caller]
+#[deprecated = "This function is being removed to conform to Rust idioms. \
+                Please use `RwSignal::new()` instead."]
+pub fn create_rw_signal<T: Send + Sync + 'static>(
+    value: T,
+) -> RwSignal<T> {
+    RwSignal::new(value)
+}