multiple fullstack nits/cleanups before release (#4852)

* feat: `:arg` syntax for serverfn

* add better decode/encode verify message

* allow catch-all query args

* add rebind

* implement websocket frames for `Streaming`

* fix lazy init

* wip... serverfnstate

* wip...

* wip: serverfns require Send/Sync, let's fix that

* wip...

* small cleanup

* fix hang by actually spawning the tokio task

* clippy

* fix parameter catchall binding

* fix lychee

* doc tests

examples/07-fullstack/query_params.rs

@@ -0,0 +1,55 @@
+//! An example showcasing query parameters in Dioxus Fullstack server functions.
+//!
+//! The query parameter syntax mostly follows axum, but with a few extra conveniences.
+//! - can rename parameters in the function signature with `?age=age_in_years` where `age_in_years` is Rust variable name
+//! - can absorb all query params with `?{object}` directly into a struct implementing `Deserialize`
+
+use dioxus::prelude::*;
+
+fn main() {
+    dioxus::launch(|| {
+        let mut message = use_action(get_message);
+        let mut message_rebind = use_action(get_message_rebind);
+        let mut message_all = use_action(get_message_all);
+
+        rsx! {
+            h1 { "Server says: "}
+            div {
+                button { onclick: move |_| message.call(22), "Single" }
+                pre { "{message:?}"}
+            }
+            div {
+                button { onclick: move |_| message_rebind.call(25), "Rebind" }
+                pre { "{message_rebind:?}"}
+            }
+            div {
+                button { onclick: move |_| message_all.call(Params { age: 30, name: "world".into() }), "Bind all" }
+                pre { "{message_all:?}"}
+            }
+        }
+    });
+}
+
+#[get("/api/message/?age")]
+async fn get_message(age: i32) -> Result<String> {
+    Ok(format!("You are {} years old!", age))
+}
+
+#[get("/api/rebind/?age=age_in_years")]
+async fn get_message_rebind(age_in_years: i32) -> Result<String> {
+    Ok(format!("You are {} years old!", age_in_years))
+}
+
+#[derive(serde::Deserialize, serde::Serialize, Debug)]
+struct Params {
+    age: i32,
+    name: String,
+}
+
+#[get("/api/all/?{query}")]
+async fn get_message_all(query: Params) -> Result<String> {
+    Ok(format!(
+        "Hello {}, you are {} years old!",
+        query.name, query.age
+    ))
+}