feat(ops): implement fast lazy async ops (#16579)

Implements fast scheduling of deferred op futures. 

```rs
#[op(fast)]
async fn op_read(
  state: Rc<RefCell<OpState>>,
  rid: ResourceId,
  buf: &mut [u8],
) -> Result<u32, Error> {
  // ...
}
```

The future is scheduled via a fast API call and polled by the event loop
after being woken up by its waker.

1 files changed, 3 insertions, 0 deletions

diff --git a/ops/optimizer_tests/async_nop.rs b/ops/optimizer_tests/async_nop.rs
new file mode 100644
index 000000000..95a1522f1
--- /dev/null
+++ b/ops/optimizer_tests/async_nop.rs
@@ -0,0 +1,3 @@
+async fn op_void_async() {
+  // @test-attr:fast
+}