Fix nested rsx expansion by not using template titles (#2799)

* Fix nested rsx expansion by not using template titles

* fix writers with nameless templates

* fix clippy

* dont commit vscode fix

* fix release mode, pull out __template_name

* fix axum_desktop

* Fix core tests

* Make most fields of HotReloadedTemplate public for testing

* wip: formatting, compare all diff cases

* slightly smarter diffing for dynamic nodes

* add a comment about generic node diffing

* clean up mutations a bit

* fix load template

* simplify maybe_rebuild

* Restore write mutations flag in web

* write_mutations -> skip_mutations

---------

Co-authored-by: Evan Almloff <evanalmloff@gmail.com>

packages/core/tests/lifecycle.rs

@@ -30,10 +30,11 @@ fn manual_diffing() {
     *value.lock().unwrap() = "goodbye";
 
     assert_eq!(
-        dom.rebuild_to_vec().sanitize().edits,
+        dom.rebuild_to_vec().edits,
         [
-            LoadTemplate { name: "template", index: 0, id: ElementId(3) },
-            HydrateText { path: &[0], value: "goodbye".to_string(), id: ElementId(4) },
+            LoadTemplate { index: 0, id: ElementId(3) },
+            CreateTextNode { value: "goodbye".to_string(), id: ElementId(4) },
+            ReplacePlaceholder { path: &[0], m: 1 },
             AppendChildren { m: 1, id: ElementId(0) }
         ]
     );