feat: custom scripting extension implemented (that was tough)

feat: custom scripting extension implemented (that was tough)

feat: added ability to read text from process output

feat: added ability to read text from process output

feat: added first compilation api

feat: added first compilation api

fix: jvm target is set to 8 because Kotlin launches scripts with such…

fix: GitHub CI fixed

Previous GitHub CI for Kotlin Multiplatform was replaced with CI tasks for
Kotlin/JVM