feat: implement Haptika PPG and Watch V1

metro.config.js

@@ -6,6 +6,13 @@ const { getDefaultConfig, mergeConfig } = require('@react-native/metro-config');
  *
  * @type {import('@react-native/metro-config').MetroConfig}
  */
-const config = {};
+const config = {
+  // The node crawler is more reliable than Watchman on workspaces stored in
+  // synchronised/user-document folders, where Watchman can deadlock while
+  // resolving the project root.
+  resolver: {
+    useWatchman: false,
+  },
+};
 
 module.exports = mergeConfig(getDefaultConfig(__dirname), config);