splits m:b simulator state

sim/state/lightsensor.ts

@@ -0,0 +1,17 @@
+namespace pxsim {
+    export class LightSensorState {
+        usesLightLevel = false;
+        lightLevel = 128;
+    }
+}
+
+namespace pxsim.input {
+    export function lightLevel(): number {
+        let b = board().lightSensorState;
+        if (!b.usesLightLevel) {
+            b.usesLightLevel = true;
+            runtime.queueDisplayUpdate();
+        }
+        return b.lightLevel;
+    }
+}