KT-38027 Support Code Vision feature in Kotlin

idea/testData/codeInsight/codeVision/TooManyUsagesAndInheritors.kt

@@ -0,0 +1,18 @@
+// MODE: usages-&-inheritors
+// USAGES-LIMIT: 3
+// INHERITORS-LIMIT: 2
+
+<# block [ 3+ Usages   2+ Inheritors] #>
+open class SomeClass {
+    class NestedDerivedClass: SomeClass() {} // <== (1): nested class
+}
+<# block [ 1 Usage   1 Inheritor] #>
+open class DerivedClass : SomeClass {} // <== (2): direct derived one
+class AnotherDerivedClass : SomeClass {} // <== (3): yet another derived one
+class DerivedDerivedClass : DerivedClass { // <== (): indirect inheritor of SomeClass
+    fun main() {
+        val someClassInstance = object : SomeClass() // { <== (4): anonymous derived one
+            val somethingHere = ""
+        }
+    }
+}