create some more compelling examples

packages/signals/README.md

@@ -54,3 +54,25 @@ fn Child(cx: Scope<ChildProps>) -> Element {
     }
 }
 ```
+
+Because subscriptions happen when you read from (not create) the data, you can provide signals through the normal context API:
+
+```rust
+fn app(cx: Scope) -> Element {
+    // Because signal is never read in this component, this component will not rerun when the signal changes
+    use_context_provider(cx, || Signal::new(0));
+
+    render! {
+        Child {}
+    }
+}
+
+fn Child(cx: Scope) -> Element {
+    let signal: Signal<i32> = *use_context(cx).unwrap();
+    // This component does read from the signal, so when the signal changes it will rerun
+    render! {
+        "{signal}"
+    }
+}
+
+```