feat(pos): Capacitor mobile app setup — Android + iOS wrapper

Set up Capacitor to wrap the Nexus POS web app as a native mobile app.
The app loads from the remote server URL so no bundling is needed.
Includes native-bridge.js for camera, push notifications, haptics,
and status bar integration when running inside the native shell.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

pos/package.json

@@ -0,0 +1,24 @@
+{
+  "name": "pos",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "type": "commonjs",
+  "dependencies": {
+    "@capacitor/android": "^8.3.0",
+    "@capacitor/camera": "^8.0.2",
+    "@capacitor/cli": "^7.6.1",
+    "@capacitor/core": "^8.3.0",
+    "@capacitor/haptics": "^8.0.2",
+    "@capacitor/ios": "^8.3.0",
+    "@capacitor/push-notifications": "^8.0.3",
+    "@capacitor/splash-screen": "^8.0.1",
+    "@capacitor/status-bar": "^8.0.2"
+  }
+}