feat: expose header height in context

packages/stack/src/utils/useCardAnimation.tsx

@@ -0,0 +1,14 @@
+import * as React from 'react';
+import CardAnimationContext from './CardAnimationContext';
+
+export default function useCardAnimation() {
+  const animation = React.useContext(CardAnimationContext);
+
+  if (animation === undefined) {
+    throw new Error(
+      "Couldn't find values for card animation. Are you inside a screen in Stack?"
+    );
+  }
+
+  return animation;
+}