codify "platform" into resolution logic, server-fn/fullstack overhaul (#4596)

overhaul dioxus fullstack using a new implementation of server_fn

This PR is a complete rewrite of dioxus fullstack designed to improve compatibility with axum and to fix a number of compilation errors based on feature flag unification plumbing through macros.

examples/09-reference/generic_component.rs

@@ -0,0 +1,28 @@
+//! This example demonstrates how to create a generic component in Dioxus.
+//!
+//! Generic components can be useful when you want to create a component that renders differently depending on the type
+//! of data it receives. In this particular example, we're just using a type that implements `Display` and `PartialEq`,
+
+use dioxus::prelude::*;
+use std::fmt::Display;
+
+fn main() {
+    dioxus::launch(app);
+}
+
+fn app() -> Element {
+    rsx! {
+        generic_child { data: 0 }
+    }
+}
+
+#[derive(PartialEq, Props, Clone)]
+struct GenericChildProps<T: Display + PartialEq + Clone + 'static> {
+    data: T,
+}
+
+fn generic_child<T: Display + PartialEq + Clone>(props: GenericChildProps<T>) -> Element {
+    rsx! {
+        div { "{props.data}" }
+    }
+}