Kapt: Add runtime library, move all modules inside the 'kapt3' directory

plugins/kapt3/kapt3-compiler/testData/kotlinRunner/Simple.kt

@@ -0,0 +1,23 @@
+package test
+
+internal class Simple {
+    @MyAnnotation
+    fun myMethod() {
+        // do nothing
+    }
+
+    fun heavyMethod(): Int {
+        return if (true) 5 else 6
+    }
+}
+
+internal annotation class MyAnnotation
+
+internal enum class EnumClass {
+    BLACK, WHITE
+}
+
+
+internal enum class EnumClass2 private constructor(private val blah: String) {
+    WHITE("A"), RED("B")
+}