KT-38027 Support Code Vision feature in Kotlin

idea/testData/codeInsight/codeVision/InterfaceImplementations.kt

@@ -0,0 +1,9 @@
+// MODE: inheritors
+
+<# block [ 3 Implementations] #>
+interface SomeInterface {}
+interface SomeOtherInterface : SomeInterface {} // <== (1): interface extension
+class SomeClass : SomeInterface { // <== (2): interface implementation
+    fun acceptsInterface(param: SomeInterface) {}
+    fun main() = acceptsInterface(object : SomeInterface {}) // <== (3): anonymous class instance
+}