Enhance the kotlinx-benchmark library API and user experience

This proposal focuses on enhancing the kotlinx-benchmark library API and user experience, fostering community growth and collaboration in Kotlin multiplatform development. The kotlinx-benchmark library is an open-source solution for benchmarking Kotlin code across multiple platforms. Although it provides a foundational structure, it currently lacks several essential quality-of-life features that would streamline its usage. This project aims to address these limitations by introducing fine-grained benchmark configuration options, ensuring feature parity between JVM and Kotlin/Native benchmarking, developing a command-line API, and integrating modern Gradle support. Furthermore, the project will enhance the library's documentation, integration tests, and examples to provide a comprehensive user experience. The anticipated outcomes of this project encompass: - Comprehensive documentation with practical usage examples - A user-friendly API that simplifies the benchmarking process - Versatile options for benchmarking Kotlin/JVM code across various platforms To successfully execute this project, proficiency in Kotlin and an understanding of Gradle internals are essential. By undertaking this project for Google Summer of Code, I aim to contribute significantly to the Kotlin ecosystem and promote a thriving open-source community centered around multiplatform development.