Upgrade knob interaction logic and dependency versions.
Reworked knob value adjustment to use precise mouse coordinates via `setValueByMouseCoords`. Improved user interaction by enhancing activation handling and CSS styling. Updated project dependencies, removed unused packages, and set version to 1.2.0 for compatibility and feature stability.
Updated multiple dependencies including Kotlin, Webpack, and Mocha to their latest versions. The project's JDK was upgraded to version 21, and the Kotlin multiplatform plugin version updated to 2.1.0. This ensures better compatibility, improved performance, and access to new features.
