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/android/build.gradle

@@ -19,3 +19,12 @@ buildscript {
 }
 
 apply plugin: "com.facebook.react.rootproject"
+
+allprojects {
+    repositories {
+        maven {
+            url("$rootDir/../node_modules/detox/Detox-android")
+        }
+        maven { url 'https://www.jitpack.io' }
+    }
+}