Synchronous prevent default (#2792)

* add prevent default methods to the event

* sync prevent default almost working

* sync prevent default working

* Move event handling into the runtime

* update core tests

* restore desktop file dialog

* implement prevent default on web

* add a hint about the new prevent default method

* fix web prevent default

* Fix CTRL+click on links

* fix values memorize in place test

* Fix a few more tests

* Add a playwright test for sync prevent default

* Fix core doc tests

* create a deprecated VirtualDom::handle_event

* fix macos imports in desktop

* Fix onmounted event

* Fix liveview support

* switch to RefCell for metadata

* Remove println

* remove prevent default attribute

* remove web specific link behavior

* Fix liveview links

* more liveview fixes for link

* Fix merge conflicts

* Fix clippy

* use the new prevent default in the file upload example

examples/svg.rs

@@ -40,8 +40,10 @@ fn Dice() -> Element {
     rsx! {
         svg {
             view_box: "-1000 -1000 2000 2000",
-            prevent_default: "onclick",
-            onclick: move |_| value.set(thread_rng().gen_range(1..=6)),
+            onclick: move |event| {
+                event.prevent_default();
+                value.set(thread_rng().gen_range(1..=6))
+            },
             rect { x: -1000, y: -1000, width: 2000, height: 2000, rx: 200, fill: "#aaa" }
             for ((x, y), _) in DOTS.iter().zip(active_dots.read().iter()).filter(|(_, &active)| active) {
                 circle {