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* sets up nasm for windows builds (to be superseded by Remove Dioxus CLI NASM dependency #2666 #2682)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/rsx/src/literal.rs

@@ -160,15 +160,11 @@ impl ToTokens for HotLiteral {
                     // But the key is what's keeping it stable
                     GlobalSignal::with_key(
                         || #val, {
-                        concat!(
-                            file!(),
-                            ":",
-                            line!(),
-                            ":",
-                            column!(),
-                            ":",
-                            #hr_idx
-                        )
+                        {
+                            const PATH: &str = dioxus_core::const_format::str_replace!(file!(), "\\\\", "/");
+                            const NORMAL: &str = dioxus_core::const_format::str_replace!(PATH, '\\', "/");
+                            dioxus_core::const_format::concatcp!(NORMAL, ':', line!(), ':', column!(), ':', #hr_idx)
+                        }
                     })
                     .maybe_with_rt(|s| s #mapped)
                 }