added rive and rive animation to the project and onboarding

trackeroo/android/app/build.gradle

trackeroo/assets/rive/piggy.riv

trackeroo/lib/app_scaffold.dart

trackeroo/lib/frontend/utils/onboarding/ob_categories.dart

trackeroo/lib/frontend/utils/onboarding/ob_details.dart

trackeroo/lib/frontend/utils/onboarding/ob_home.dart

trackeroo/lib/frontend/utils/onboarding/ob_trackeroo.dart

trackeroo/macos/Flutter/GeneratedPluginRegistrant.swift

trackeroo/pubspec.lock

trackeroo/pubspec.yaml

trackeroo/windows/flutter/generated_plugin_registrant.cc

trackeroo/windows/flutter/generated_plugins.cmake