implementation("io.github.the-best-is-best:kfirebase-messaging:1.0.0-rc4")KFirebaseMessaging is a Kotlin Multiplatform Mobile (KMM) package that simplifies the integration of Firebase Cloud Messaging (FCM) across Android and iOS platforms. It provides a unified API for handling push notifications and FCM messaging in a shared codebase, allowing developers to seamlessly implement FCM functionality for both platforms without duplicating code.