Replace Sentry with Firebase Analytics for app monitoring

Removes Sentry integration and error tracking in favor of Firebase Analytics throughout the app. Updates error handling, analytics, and event logging to use Firebase services. Adds new analytics events for user actions, login, registration, profile, cart, and product views. Cleans up Sentry-related code and dependencies from configs and build files.

Switches Android Kotlin plugin to latest version and bumps app version. Improves monitoring and observability for business metrics and user behavior while simplifying error reporting.