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.

.github/workflows/typos.yml

@@ -16,7 +16,7 @@ jobs:
   typos:
     if: github.event.pull_request.draft == false
     name: Check for typos
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-4vcpu-ubuntu-2404
     steps:
       - uses: actions/checkout@v5
       - name: Check for typos
@@ -26,7 +26,7 @@ jobs:
   link-check:
     if: github.event.pull_request.draft == false
     name: Check For Invalid Links
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-4vcpu-ubuntu-2404
     steps:
       - uses: actions/checkout@v5
       - name: Restore lychee cache