adds feature server_fn_axum that compiles for wasm target (#3840)

The current `axum` feature and `server` feature are incompatible with wasm32-unknown-unknown target
due to:
1. depends on axum features not compatible with wasm
2. SSR requires reading the filesystem for index.html

With this patch I add the `server_fn_axum` feature which disables SSR and enables targeting
wasm32-unknown-unknown with server functions enabled.

Note that for this to work, `server_fn` depends on `inventory` and as stated in this docs depending on
the context you might need to expose and call [`__wasm_call_ctors`](https://docs.rs/inventory/latest/inventory/#webassembly-and-constructors)
(I needed that specifically for cloudflare workers)

change axum_server_fn feature for axum_wasm and include SSR tools there

This change additionaly make axum_server_fn feature additive by exposing a different
`DioxusRouterWasmExt` with only the wasm-compatible parts instead of exposing the
`DioxusRouter` trait under the same name.

Docs are updated to reflect this change.

rename axum_wasm to axum_core and update docs

fix typo

re-enable default-features for axum in dioxus-cli

re-enable axum default-features for liveview

re-enable default-features for axum for playwright-tests

packages/fullstack/src/lib.rs

@@ -4,14 +4,24 @@
 #![deny(missing_docs)]
 #![cfg_attr(docsrs, feature(doc_cfg))]
 
+use std::sync::Arc;
+
 pub use once_cell;
 
 mod html_storage;
 
+#[allow(unused)]
+pub(crate) type ContextProviders =
+    Arc<Vec<Box<dyn Fn() -> Box<dyn std::any::Any> + Send + Sync + 'static>>>;
+
 #[cfg(feature = "axum")]
 #[cfg_attr(docsrs, doc(cfg(feature = "axum")))]
 pub mod server;
 
+#[cfg(feature = "axum_core")]
+#[cfg_attr(docsrs, doc(cfg(feature = "axum_core")))]
+pub mod axum_core;
+
 mod hooks;
 
 pub mod document;
@@ -22,6 +32,7 @@ mod streaming;
 
 #[cfg(feature = "server")]
 mod serve_config;
+
 #[cfg(feature = "server")]
 pub use serve_config::*;
 
@@ -37,6 +48,9 @@ pub mod prelude {
     #[cfg_attr(docsrs, doc(cfg(feature = "axum")))]
     pub use crate::server::*;
 
+    #[cfg(feature = "axum_core")]
+    pub use crate::axum_core::*;
+
     #[cfg(feature = "server")]
     #[cfg_attr(docsrs, doc(cfg(feature = "server")))]
     pub use crate::render::{FullstackHTMLTemplate, SSRState};
@@ -45,8 +59,8 @@ pub mod prelude {
     #[cfg_attr(docsrs, doc(cfg(feature = "server")))]
     pub use crate::serve_config::{ServeConfig, ServeConfigBuilder};
 
-    #[cfg(all(feature = "server", feature = "axum"))]
-    #[cfg_attr(docsrs, doc(cfg(all(feature = "server", feature = "axum"))))]
+    #[cfg(feature = "axum")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "axum")))]
     pub use crate::server_context::Axum;
 
     #[cfg(feature = "server")]