Add initial implementation of Map SDK and example app

- Create README for the main repository and example app
- Implement example app with MapView and Marker components
- Add package.json for example app with necessary scripts and dependencies
- Create Map SDK package with TypeScript wrapper around react-native-maps
- Define TypeScript configuration for the SDK

packages/map-sdk/README.md

@@ -0,0 +1,33 @@
+# @lynkedup/map-sdk
+
+A small TypeScript wrapper around `react-native-maps` to provide a consistent API and typed components.
+
+## Usage
+
+Install peer deps in your app:
+
+```
+npm install react-native react-native-maps
+# and add this package via workspace or npm/yarn
+```
+
+Basic usage:
+
+```ts
+import React from 'react';
+import { MapView, Marker } from '@lynkedup/map-sdk';
+
+export default function App() {
+  return (
+    <MapView
+      style={{ flex: 1 }}
+      initialRegion={{ latitude: 37.78825, longitude: -122.4324, latitudeDelta: 0.0922, longitudeDelta: 0.0421 }}
+    >
+      <Marker coordinate={{ latitude: 37.78825, longitude: -122.4324 }} />
+    </MapView>
+  );
+}
+```
+
+## Notes
+- This package delegates to `react-native-maps` for platform implementations. Follow `react-native-maps` docs for iOS/Android setup (Google Maps API key, pods, manifest permissions).