cherry-pick Cooperate (#985)

* cooperate pause

* fix math

* update lastPause before pausing

* faster cooperation

Co-authored-by: Peli de Halleux <peli@DESKTOP-5B7QRAM.corp.microsoft.com>

libs/core/cooperate.ts

@@ -0,0 +1,11 @@
+namespace control {
+    let lastPause = 0;
+    const COOPERATION_INTERVAL = 20
+    export function cooperate() {
+        const now = control.millis()
+        if (now - lastPause > COOPERATION_INTERVAL) {
+            lastPause = now
+            pause(1)
+        }
+    }
+}