Fix some CI (windows + nasm, core-macro error) (#2676)

* Moves index.html creation until after wasm creation so the webserver doesn't prematurely serve the page
* sets up nasm for windows builds (to be superseded by Remove Dioxus CLI NASM dependency #2666 #2682)
* puts magnanis-cli-support in a blocking task to prevent threadlocking during sequential builds
* changes order of client/server builds such that the client is built before the server so the webserver doesn't prematurely serve invalid client code
* declobbers "serve" such that each project gets a different dir in the target folder
* uses nest_service instead of fallback so the router doesn't respond with fallback codes
* reincorporates doge's fix from Fix hot-reloading on Windows #2544

packages/cli/src/serve/server.rs

@@ -328,13 +328,13 @@ fn setup_router(
     match platform {
         Platform::Web => {
             // Route file service to output the .wasm and assets if this is a web build
-            router = router.fallback(build_serve_dir(serve, config));
+            router = router.nest_service("/", build_serve_dir(serve, config));
         }
         Platform::Fullstack | Platform::StaticGeneration => {
             // For fullstack and static generation, forward all requests to the server
             let address = fullstack_address.unwrap();
 
-            router = router.fallback(super::proxy::proxy_to(
+            router = router.nest_service("/",super::proxy::proxy_to(
                 format!("http://{address}").parse().unwrap(),
                 true,
                 |error| {