Re-export the axum feature flag under "server" (#2786)

* re-export the axum feature flag under "server"
* remove the axum prefix from all the fullstack examples

packages/fullstack/examples/router/.gitignore

@@ -0,0 +1,4 @@
+dist
+target
+static
+.dioxus

packages/fullstack/examples/router/Cargo.toml

@@ -0,0 +1,19 @@
+[package]
+name = "fullstack-router-example"
+version = "0.1.0"
+edition = "2021"
+publish = false
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+dioxus = { workspace = true, features = ["fullstack", "router"] }
+axum = { workspace = true, optional = true }
+tokio = {workspace = true, features = ["full"], optional = true }
+serde = { version = "1.0.159", features = ["derive"] }
+
+[features]
+default = []
+server = ["axum", "dioxus/axum"]
+web = ["dioxus/web"]
+

packages/fullstack/examples/router/src/main.rs

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+//! Run with:
+//!
+//! ```sh
+//! dx serve --platform fullstack
+//! ```
+
+use dioxus::prelude::*;
+
+fn main() {
+    LaunchBuilder::fullstack()
+        .with_cfg(server_only!(ServeConfig::builder().incremental(
+            IncrementalRendererConfig::default()
+                .invalidate_after(std::time::Duration::from_secs(120)),
+        )))
+        .launch(app);
+}
+
+fn app() -> Element {
+    rsx! { Router::<Route> {} }
+}
+
+#[derive(Clone, Routable, Debug, PartialEq, serde::Serialize, serde::Deserialize)]
+enum Route {
+    #[route("/")]
+    Home {},
+
+    #[route("/blog/:id")]
+    Blog { id: i32 },
+}
+
+#[component]
+fn Blog(id: i32) -> Element {
+    rsx! {
+        Link { to: Route::Home {}, "Go to counter" }
+        table {
+            tbody {
+                for _ in 0..id {
+                    tr {
+                        for _ in 0..id {
+                            td { "hello world!" }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+
+#[component]
+fn Home() -> Element {
+    let mut count = use_signal(|| 0);
+    let mut text = use_signal(|| "...".to_string());
+
+    rsx! {
+        Link { to: Route::Blog { id: count() }, "Go to blog" }
+        div {
+            h1 { "High-Five counter: {count}" }
+            button { onclick: move |_| count += 1, "Up high!" }
+            button { onclick: move |_| count -= 1, "Down low!" }
+            button {
+                onclick: move |_| async move {
+                    if let Ok(data) = get_server_data().await {
+                        println!("Client received: {}", data);
+                        text.set(data.clone());
+                        post_server_data(data).await.unwrap();
+                    }
+                },
+                "Run server function!"
+            }
+            "Server said: {text}"
+        }
+    }
+}
+
+#[server(PostServerData)]
+async fn post_server_data(data: String) -> Result<(), ServerFnError> {
+    println!("Server received: {}", data);
+
+    Ok(())
+}
+
+#[server(GetServerData)]
+async fn get_server_data() -> Result<String, ServerFnError> {
+    Ok("Hello from the server!".to_string())
+}