Insert imports on copy/paste

Introduce KotlinCopyPasteReferenceProcessor

idea/testData/copyPaste/imports/DependencyOnJava.dependency.java

@@ -0,0 +1,16 @@
+package java;
+
+public class JavaClass {
+    public static int staticMethod() {
+        return 3;
+    }
+
+    public void method() {
+    }
+
+    public class InnerClass {
+    }
+
+    public class NestedClass {
+    }
+}