Quick-fix for header without implementation + a set of tests #KT-14908 Fixed

idea/testData/multiModuleQuickFix/object/header/header.kt

@@ -0,0 +1,5 @@
+// "Create header class implementation for platform JVM" "true"
+
+header object <caret>Object {
+    fun foo(): String
+}

idea/testData/multiModuleQuickFix/object/header/header.kt.after

@@ -0,0 +1,5 @@
+// "Create header class implementation for platform JVM" "true"
+
+header object Object {
+    fun foo(): String
+}