Remove native and web features from dioxus-html (#3006)

* remove native and web features from dioxus-html

* Fix downcasting web events

* Fix desktop with tokio disabled

packages/web/src/events/transition.rs

@@ -0,0 +1,22 @@
+use dioxus_html::HasTransitionData;
+use web_sys::TransitionEvent;
+
+use super::Synthetic;
+
+impl HasTransitionData for Synthetic<TransitionEvent> {
+    fn elapsed_time(&self) -> f32 {
+        self.event.elapsed_time()
+    }
+
+    fn property_name(&self) -> String {
+        self.event.property_name()
+    }
+
+    fn pseudo_element(&self) -> String {
+        self.event.pseudo_element()
+    }
+
+    fn as_any(&self) -> &dyn std::any::Any {
+        self
+    }
+}