Add kotlinp, a tool to print Kotlin metadata in class/module files

At the moment, it's not published anywhere, but that may change soon

 #KT-23198

libraries/tools/kotlinp/testData/LocalClass.txt

@@ -0,0 +1,26 @@
+// A.class
+// ------------------------------------------
+public final class A : kotlin/Any {
+
+  // signature: <init>()V
+  public /* primary */ constructor()
+}
+// A$L.class
+// ------------------------------------------
+local final class .A$L<T#0 /* T */> : kotlin/Any {
+
+  // signature: <init>()V
+  public /* primary */ constructor()
+
+  // signature: x(LA$L;)V
+  public final fun x(l: .A$L<.A$L<T#0>.I>): kotlin/Unit
+
+  // nested class: I
+}
+// A$L$I.class
+// ------------------------------------------
+local final inner class .A$L.I : kotlin/Any {
+
+  // signature: <init>(LA$L;)V
+  public /* primary */ constructor()
+}