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

README.md

@@ -0,0 +1,11 @@
+# Map SDK Monorepo
+
+This repository contains a TypeScript wrapper package (`@lynkedup/map-sdk`) that builds on `react-native-maps`, plus an `example` React Native app demonstrating usage.
+
+Quick commands:
+
+- Install deps: `npm run bootstrap`
+- Build SDK: `npm run build`
+- Start example: `npm run start:example`
+
+See package READMEs for platform-specific setup (iOS/Android) and usage notes.