Create some new standard library modules

modules/debug/gradle.properties

@@ -0,0 +1,7 @@
+version=0.0.1
+
+pluginVersion=0.1
+pluginId=smnp.lang.debug
+pluginClass=
+pluginProvider=Bartłomiej Pluta
+pluginDependencies=

modules/debug/src/main/kotlin/io/smnp/ext/DebugModule.kt

@@ -0,0 +1,9 @@
+package io.smnp.ext
+
+import io.smnp.ext.function.CallStackFunction
+import org.pf4j.Extension
+
+@Extension
+class DebugModule : NativeModuleProvider("smnp.lang.debug") {
+   override fun functions() = listOf(CallStackFunction())
+}

modules/debug/src/main/kotlin/io/smnp/ext/function/CallStackFunction.kt

@@ -0,0 +1,15 @@
+package io.smnp.ext.function
+
+import io.smnp.callable.function.Function
+import io.smnp.callable.function.FunctionDefinitionTool
+import io.smnp.callable.signature.Signature
+import io.smnp.type.model.Value
+
+class CallStackFunction : Function("callstack") {
+   override fun define(new: FunctionDefinitionTool) {
+      new function Signature.simple() body { env, _ ->
+         env.printCallStack()
+         Value.void()
+      }
+   }
+}