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/ts/eval.ts

@@ -0,0 +1,43 @@
+import {
+  DioxusChannel,
+  Channel,
+  WeakDioxusChannel,
+} from "../../../html/src/ts/eval";
+
+export class WebDioxusChannel extends DioxusChannel {
+  js_to_rust: Channel;
+  rust_to_js: Channel;
+  owner: any;
+
+  constructor(owner: any) {
+    super();
+    this.owner = owner;
+    this.js_to_rust = new Channel();
+    this.rust_to_js = new Channel();
+  }
+
+  // Return a weak reference to this channel
+  weak(): WeakDioxusChannel {
+    return new WeakDioxusChannel(this);
+  }
+
+  // Receive message from Rust
+  async recv() {
+    return await this.rust_to_js.recv();
+  }
+
+  // Send message to rust.
+  send(data: any) {
+    this.js_to_rust.send(data);
+  }
+
+  // Send data from rust to javascript
+  rustSend(data: any) {
+    this.rust_to_js.send(data);
+  }
+
+  // Receive data sent from javascript in rust
+  async rustRecv(): Promise<any> {
+    return await this.js_to_rust.recv();
+  }
+}