feat(kotlin): Add the kotlin module (#2026)

Add a module to show the currently installed Kotlin version if a
.kt/.kts file is found in the current folder

src/configs/mod.rs

@@ -26,6 +26,7 @@ pub mod hostname;
 pub mod java;
 pub mod jobs;
 pub mod julia;
+pub mod kotlin;
 pub mod kubernetes;
 pub mod lua;
 pub mod memory_usage;