feat: scaffold Expo Prebuild project with all v1 screens and services

Sets up the full bincio-rec source tree: Zustand recording store with
haversine stats, background GPS via expo-task-manager, BLE scan/subscribe
for HR and power, GPX writer with Garmin extensions, SQLite recordings
list, multipart upload to bincio-activity, React Navigation stack with
bottom tabs, and build instructions in README.md.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

package.json

@@ -3,10 +3,29 @@
   "version": "1.0.0",
   "main": "index.ts",
   "dependencies": {
+    "@maplibre/maplibre-react-native": "^11.3.2",
+    "@react-native-async-storage/async-storage": "^3.1.1",
+    "@react-navigation/bottom-tabs": "^7.16.2",
+    "@react-navigation/native": "^7.2.5",
+    "@react-navigation/native-stack": "^7.16.0",
     "expo": "~56.0.8",
+    "expo-av": "^16.0.8",
+    "expo-crypto": "^56.0.4",
+    "expo-file-system": "~56.0.7",
+    "expo-keep-awake": "~56.0.3",
+    "expo-location": "~56.0.15",
+    "expo-notifications": "~56.0.15",
+    "expo-sharing": "^56.0.15",
+    "expo-sqlite": "~56.0.4",
     "expo-status-bar": "~56.0.4",
+    "expo-task-manager": "~56.0.16",
     "react": "19.2.3",
-    "react-native": "0.85.3"
+    "react-native": "0.85.3",
+    "react-native-ble-plx": "^3.5.1",
+    "react-native-gesture-handler": "~2.31.1",
+    "react-native-safe-area-context": "~5.7.0",
+    "react-native-screens": "4.25.2",
+    "zustand": "^5.0.14"
   },
   "devDependencies": {
     "@types/react": "~19.2.2",
@@ -14,8 +33,8 @@
   },
   "scripts": {
     "start": "expo start",
-    "android": "expo start --android",
-    "ios": "expo start --ios",
+    "android": "expo run:android",
+    "ios": "expo run:ios",
     "web": "expo start --web"
   },
   "private": true