feat: implement Haptika PPG and Watch V1

src/features/ppg/camera/usePPGCamera.ts

@@ -0,0 +1,23 @@
+import {useCallback} from 'react';
+import {useCameraPermission} from 'react-native-vision-camera';
+
+export interface PPGCameraPermissionController {
+  hasCameraPermission: boolean;
+  requestCameraPermission: () => Promise<boolean>;
+}
+
+export function usePPGCamera(): PPGCameraPermissionController {
+  const {hasPermission, requestPermission} = useCameraPermission();
+
+  const requestCameraPermission = useCallback(async (): Promise<boolean> => {
+    if (hasPermission) {
+      return true;
+    }
+    return requestPermission();
+  }, [hasPermission, requestPermission]);
+
+  return {
+    hasCameraPermission: hasPermission,
+    requestCameraPermission,
+  };
+}