fix: switch to future based diffing

this commit removes the old manual fiber implementation in favor of a
traditional recursion based approach. This should make the diffing
algorithm easier to work on and eliminate various stack-based bugs in.

packages/core/src/lib.rs

@@ -1,7 +1,8 @@
 #![allow(non_snake_case)]
 #![doc = include_str!("../README.md")]
 
-pub(crate) mod diff;
+// pub(crate) mod diff;
+pub(crate) mod diff_async;
 pub(crate) mod events;
 pub(crate) mod lazynodes;
 pub(crate) mod mutations;
@@ -12,7 +13,8 @@ pub(crate) mod util;
 pub(crate) mod virtual_dom;
 
 pub(crate) mod innerlude {
-    pub(crate) use crate::diff::*;
+    pub(crate) use crate::diff_async::*;
+    // pub(crate) use crate::diff::*;
     pub use crate::events::*;
     pub use crate::lazynodes::*;
     pub use crate::mutations::*;