Upgraded the Kotlin version from 2.0.0-RC1 to 2.0.21 and adjusted various dependencies to their latest versions. Added new Maven repository URLs and updated `.idea` project artifacts to reflect the new versioning and project setup.
Upgraded the Kotlin version from 2.0.0-RC1 to 2.0.21 and adjusted various dependencies to their latest versions. Added new Maven repository URLs and updated `.idea` project artifacts to reflect the new versioning and project setup.