Convert use_eval to use send/recv system (#1080)

* progress: reworked

don't run this, it'll kill your web browser

* feat: use_eval but with comms

* revision: async recv & recv_sync

* revision: use_eval

* revision: standard eval interface

* revision: use serde_json::Value instead of JsValue

* revision: docs

* revision: error message

* create: desktop eval (wip)

* fix: desktop eval

* revision: wrap use_eval in Rc<RefCell<_>>

* fix: fmt, clippy

* fix: desktop tests

* revision: change to channel system

- fixes clippy errors
- fixes playwright tests

* fix: tests

* fix: eval example

* fix: fmt

* fix: tests, desktop stuff

* fix: tests

* feat: drop handler

* fix: tests

* fix: rustfmt

* revision: web promise/callback system

* fix: recv error

* revision: IntoFuture, functionation

* fix: ci

* revision: playwright web

* remove: unescessary code

* remove dioxus-html from public examples

* prototype-patch

* fix web eval

* fix: rustfmt

* fix: CI

* make use_eval more efficient

* implement eval for liveview as well

* fix playwright tests

* fix clippy

* more clippy fixes

* fix clippy

* fix stack overflow

* fix desktop mock

* fix clippy

---------

Co-authored-by: Evan Almloff <evanalmloff@gmail.com>

playwright-tests/web/src/main.rs

@@ -1,13 +1,13 @@
 // This test is used by playwright configured in the root of the repo
 
 use dioxus::prelude::*;
-use dioxus_web::use_eval;
 
 fn app(cx: Scope) -> Element {
     let mut num = use_state(cx, || 0);
-    let eval = use_eval(cx);
     let eval_result = use_state(cx, String::new);
 
+    let eval_provider = dioxus_html::prelude::use_eval(cx);
+
     cx.render(rsx! {
         div {
             "hello axum! {num}"
@@ -42,13 +42,20 @@ fn app(cx: Scope) -> Element {
         button {
             class: "eval-button",
             onclick: move |_| {
-                // Set the window title
-                let result = eval(r#"window.document.title = 'Hello from Dioxus Eval!';
-                return "returned eval value";"#.to_string());
-                if let Ok(serde_json::Value::String(string)) = result.get() {
-                    eval_result.set(string);
-                }
-            },
+                let eval = eval_provider(
+                    r#"
+                    window.document.title = 'Hello from Dioxus Eval!';
+                    dioxus.send("returned eval value");
+                "#).unwrap();
+                let setter = eval_result.setter();
+                async move {
+                    // Set the window title
+                    let result = eval.recv().await;
+                    if let Ok(serde_json::Value::String(string)) = result {
+                        setter(string);
+                    }
+
+            }},
             "Eval"
         }
         div {