introduce store with idle tracking

apps/expo/src/stores/player/slices/video.ts

@@ -0,0 +1,25 @@
+import type { AVPlaybackStatus, Video } from "expo-av";
+
+import type { MakeSlice } from "./types";
+
+export interface VideoSlice {
+  videoRef: Video | null;
+  status: AVPlaybackStatus | null;
+
+  setVideoRef(ref: Video | null): void;
+  setStatus(status: AVPlaybackStatus | null): void;
+}
+
+export const createVideoSlice: MakeSlice<VideoSlice> = (set) => ({
+  videoRef: null,
+  status: null,
+
+  setVideoRef: (ref) => {
+    set({ videoRef: ref });
+  },
+  setStatus: (status) => {
+    set((s) => {
+      s.status = status;
+    });
+  },
+});