chore: update package.json for testing scripts and dependencies

- Added unit and end-to-end testing scripts to package.json.
- Included detox for end-to-end testing and jest-circus for improved test execution.

feat: add testID to LandingScreen logo for better testing

- Added testID attribute to the logo image in LandingScreen for easier identification in tests.

feat: create tokens.ts to re-export design tokens

- Introduced tokens.ts to re-export shared design tokens from lightTheme for consistent imports.

app/package.json

@@ -7,7 +7,13 @@
     "ios": "react-native run-ios",
     "lint": "eslint .",
     "start": "react-native start",
-    "test": "jest"
+    "test": "jest",
+    "test:unit": "jest",
+    "test:e2e:build:android": "detox build -c android.emu.debug",
+    "test:e2e:run:android": "detox test -c android.emu.debug",
+    "test:e2e:android": "npm run test:e2e:build:android && npm run test:e2e:run:android",
+    "test:full": "npm run test:unit && npm run test:e2e:android",
+    "test:e2e:auto": "node ./e2e/run-detox.js"
   },
   "dependencies": {
     "@react-native-async-storage/async-storage": "^2.2.0",
@@ -51,7 +57,9 @@
     "postinstall-postinstall": "^2.1.0",
     "prettier": "2.8.8",
     "react-test-renderer": "19.2.3",
-    "typescript": "^5.8.3"
+    "typescript": "^5.8.3",
+    "detox": "^20.47.0",
+    "jest-circus": "^29.6.3"
   },
   "engines": {
     "node": ">= 22.11.0"