chore(y-octo): migrate away depracated JsExternal API (#12130)

<!-- This is an auto-generated comment: release notes by coderabbit.ai -->

## Summary by CodeRabbit

- **Refactor**
  - Updated usage of JavaScript interop types to newer API versions for improved compatibility and consistency.
  - Changed method and type signatures to use updated types in several areas.
  - Removed an unused constructor from one component.
  - Adjusted a method to use a different JavaScript array buffer type for update callbacks.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/common/y-octo/node/src/doc.rs

@@ -1,5 +1,5 @@
 use napi::{
-  bindgen_prelude::{Buffer, Uint8Array},
+  bindgen_prelude::Uint8Array,
   threadsafe_function::{ThreadsafeFunction, ThreadsafeFunctionCallMode},
 };
 use y_octo::{CrdtRead, Doc as YDoc, History, RawDecoder, StateVector};
@@ -120,7 +120,7 @@ impl Doc {
   }
 
   #[napi(ts_args_type = "callback: (result: Uint8Array) => void")]
-  pub fn on_update(&mut self, callback: ThreadsafeFunction<Buffer>) -> Result<()> {
+  pub fn on_update(&mut self, callback: ThreadsafeFunction<Uint8Array>) -> Result<()> {
     let callback = move |update: &[u8], _h: &[History]| {
       callback.call(
         Ok(update.to_vec().into()),