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/VersionRequirement.kt

@@ -0,0 +1,19 @@
+@file:Suppress("INVISIBLE_MEMBER", "INVISIBLE_REFERENCE")
+package test
+
+import kotlin.internal.RequireKotlin
+import kotlin.internal.RequireKotlinVersionKind
+
+@RequireKotlin("1.2", "Klass must not be used!", DeprecationLevel.WARNING, RequireKotlinVersionKind.API_VERSION)
+class Klass
+
+class Konstructor @RequireKotlin("42.0", "Konstructor must not be used!", DeprecationLevel.WARNING, RequireKotlinVersionKind.LANGUAGE_VERSION, 42) constructor()
+
+@RequireKotlin("1.1", level = DeprecationLevel.HIDDEN, versionKind = RequireKotlinVersionKind.API_VERSION, errorCode = 314)
+typealias Typealias = String
+
+@RequireKotlin("1.2.40", level = DeprecationLevel.ERROR, versionKind = RequireKotlinVersionKind.COMPILER_VERSION)
+fun function() {}
+
+@RequireKotlin("1.3", "property must not be used!")
+val property = ""