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/01-app-demos/hotdog/Dockerfile

@@ -0,0 +1,24 @@
+FROM rust:1 AS chef
+RUN cargo install cargo-chef
+WORKDIR /app
+
+FROM chef AS planner
+COPY . .
+RUN cargo chef prepare --recipe-path recipe.json
+
+FROM chef AS builder
+COPY --from=planner /app/recipe.json recipe.json
+RUN cargo chef cook --release --recipe-path recipe.json
+COPY . .
+RUN curl -L --proto '=https' --tlsv1.2 -sSf https://raw.githubusercontent.com/DioxusLabs/dioxus/refs/heads/main/.github/install.sh | bash
+RUN /.cargo/bin/dx bundle --platform web
+
+FROM chef AS runtime
+COPY --from=builder /app/target/dx/hotdog/release/web/ /usr/local/app
+
+ENV PORT=8080
+ENV IP=0.0.0.0
+EXPOSE 8080
+
+WORKDIR /usr/local/app
+ENTRYPOINT [ "/usr/local/app/server" ]