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/10-integrations/bevy/src/bevy_scene_plugin.rs

@@ -0,0 +1,77 @@
+use crate::bevy_renderer::UIData;
+use bevy::prelude::*;
+
+#[derive(Component)]
+pub struct DynamicColoredCube;
+
+pub struct BevyScenePlugin {}
+
+impl Plugin for BevyScenePlugin {
+    fn build(&self, app: &mut App) {
+        app.insert_resource(ClearColor(bevy::color::Color::srgba(0.0, 0.0, 0.0, 0.0)));
+        app.add_systems(Startup, setup);
+        app.add_systems(Update, (animate, update_cube_color));
+    }
+}
+
+fn setup(
+    mut commands: Commands,
+    mut meshes: ResMut<Assets<Mesh>>,
+    mut materials: ResMut<Assets<StandardMaterial>>,
+) {
+    commands.spawn((
+        Mesh3d(meshes.add(Cuboid::new(1.0, 1.0, 1.0))),
+        MeshMaterial3d(materials.add(StandardMaterial {
+            base_color: bevy::color::Color::srgb(1.0, 0.0, 0.0),
+            metallic: 0.0,
+            perceptual_roughness: 0.5,
+            ..default()
+        })),
+        Transform::from_xyz(0.0, 0.0, 0.0),
+        DynamicColoredCube,
+    ));
+
+    commands.spawn((
+        DirectionalLight {
+            color: bevy::color::Color::WHITE,
+            illuminance: 10000.0,
+            shadows_enabled: false,
+            ..default()
+        },
+        Transform::from_xyz(1.0, 1.0, 1.0).looking_at(Vec3::ZERO, Vec3::Y),
+    ));
+
+    commands.insert_resource(AmbientLight {
+        color: bevy::color::Color::WHITE,
+        brightness: 100.0,
+        affects_lightmapped_meshes: true,
+    });
+
+    commands.spawn((
+        Camera3d::default(),
+        Transform::from_xyz(0.0, 0.0, 3.0).looking_at(Vec3::new(0.0, 0.0, 0.0), Vec3::Y),
+        Name::new("MainCamera"),
+    ));
+}
+
+fn animate(time: Res<Time>, mut cube_query: Query<&mut Transform, With<DynamicColoredCube>>) {
+    for mut transform in cube_query.iter_mut() {
+        transform.rotation = Quat::from_rotation_y(time.elapsed_secs());
+        transform.translation.x = (time.elapsed_secs() * 2.0).sin() * 0.5;
+    }
+}
+
+fn update_cube_color(
+    ui: Res<UIData>,
+    cube_query: Query<&MeshMaterial3d<StandardMaterial>, With<DynamicColoredCube>>,
+    mut materials: ResMut<Assets<StandardMaterial>>,
+) {
+    if ui.is_changed() {
+        for mesh_material in cube_query.iter() {
+            if let Some(material) = materials.get_mut(&mesh_material.0) {
+                let [r, g, b] = ui.color;
+                material.base_color = bevy::color::Color::srgb(r, g, b);
+            }
+        }
+    }
+}