feat(mobile): track mobile app scaffold

mobile/.gitignore

@@ -0,0 +1,25 @@
+# Dependencies
+app/node_modules/
+
+# Expo and Metro
+app/.expo/
+app/dist/
+app/web-build/
+app/.metro-health-check*
+
+# Generated native projects
+app/ios/
+app/android/
+
+# Local logs and caches
+*.log
+app/*.log
+app/.cache/
+app/.turbo/
+
+# Local environment
+app/.env*
+!app/.env.example
+
+# TypeScript build cache
+app/*.tsbuildinfo