Intentions: Move class member to companion object

#KT-9697 In Progress

idea/testData/multiFileIntentions/moveToCompanion/moveInnerClass/before/test.kt

@@ -0,0 +1,64 @@
+package test
+
+inline fun <T, R> with(receiver: T, block: T.() -> R): R = receiver.block()
+
+class A {
+    class X {
+
+    }
+
+    inner class OuterY
+
+    fun outerFoo(n: Int) {}
+
+    val outerBar = 1
+
+    companion object {
+        class Y
+
+        fun foo(n: Int) {}
+
+        val bar = 1
+
+        fun Int.extFoo(n: Int) {}
+
+        val Int.extBar: Int get() = 1
+    }
+
+    object O {
+        class Y
+
+        fun foo(n: Int) {}
+
+        val bar = 1
+
+        fun Int.extFoo(n: Int) {}
+
+        val Int.extBar: Int get() = 1
+    }
+
+    inner class <caret>B {
+        fun test() {
+            X()
+
+            Y()
+            foo(bar)
+            1.extFoo(1.extBar)
+
+            OuterY()
+            outerFoo(outerBar)
+
+            this@A.OuterY()
+            this@A.outerFoo(this@A.outerBar)
+
+            O.Y()
+            O.foo(O.bar)
+
+            with (O) {
+                Y()
+                foo(bar)
+                1.extFoo(1.extBar)
+            }
+        }
+    }
+}

idea/testData/multiFileIntentions/moveToCompanion/moveInnerClass/before/test2/usages.java

@@ -0,0 +1,9 @@
+package test2;
+
+import test.A;
+
+class Test {
+    A.B foo() {
+        return new A().new B();
+    }
+}

idea/testData/multiFileIntentions/moveToCompanion/moveInnerClass/before/test2/usages2.java

@@ -0,0 +1,10 @@
+package test2;
+
+import test.A;
+import test.A.B;
+
+class Test {
+    B foo() {
+        return new A().new B();
+    }
+}

idea/testData/multiFileIntentions/moveToCompanion/moveInnerClass/before/usages.kt

@@ -0,0 +1,7 @@
+package test2
+
+import test.A
+
+fun foo(): A.B {
+    return A().B()
+}

idea/testData/multiFileIntentions/moveToCompanion/moveInnerClass/before/usages2.kt

@@ -0,0 +1,8 @@
+package test2
+
+import test.A
+import test.A.B
+
+fun foo2(): B {
+    return A().B()
+}