wip: work on scheduler, async, coroutines, and merge scope into context

examples/async.rs

@@ -17,7 +17,7 @@ pub static App: FC<()> = |(cx, _)| {
 
     let (async_count, dir) = (count.for_async(), *direction);
 
-    let (task, _) = use_task(cx, move || async move {
+    let (task, _) = use_coroutine(cx, move || async move {
         loop {
             TimeoutFuture::new(250).await;
             *async_count.get_mut() += dir;

examples/coroutine.rs

@@ -32,13 +32,13 @@ static App: FC<()> = |(cx, props)| {
     let p2 = use_state(cx, || 0);
 
     let (mut p1_async, mut p2_async) = (p1.for_async(), p2.for_async());
-    let (p1_handle, _) = use_task(cx, || async move {
+    let (p1_handle, _) = use_coroutine(cx, || async move {
         loop {
             *p1_async.get_mut() += 1;
             async_std::task::sleep(std::time::Duration::from_millis(75)).await;
         }
     });
-    let (p2_handle, _) = use_task(cx, || async move {
+    let (p2_handle, _) = use_coroutine(cx, || async move {
         loop {
             *p2_async.get_mut() += 1;
             async_std::task::sleep(std::time::Duration::from_millis(100)).await;