Improve compile times by splitting out rsx-hotreload from rsx (#2971)

* fix imports, migrate over rsx-hotreload

packages/rsx-hotreload/tests/hotreloads.rs

@@ -0,0 +1,31 @@
+use dioxus_rsx_hotreload::diff_rsx;
+use syn::File;
+
+macro_rules! assert_rsx_changed {
+    (
+        $( #[doc = $doc:expr] )*
+        $name:ident
+    ) => {
+        $( #[doc = $doc] )*
+        #[test]
+        fn $name() {
+            let old = include_str!(concat!("./valid/", stringify!($name), ".old.rsx"));
+            let new = include_str!(concat!("./valid/", stringify!($name), ".new.rsx"));
+            let (old, new) = load_files(old, new);
+            assert!(diff_rsx(&new, &old).is_some());
+        }
+    };
+}
+
+fn load_files(old: &str, new: &str) -> (File, File) {
+    let old = syn::parse_file(old).unwrap();
+    let new = syn::parse_file(new).unwrap();
+    (old, new)
+}
+
+assert_rsx_changed![combo];
+assert_rsx_changed![expr];
+assert_rsx_changed![for_];
+assert_rsx_changed![if_];
+assert_rsx_changed![let_];
+assert_rsx_changed![nested];