Add quick fix to replace all 'class object's in project

idea/testData/quickfix/migration/classObjectToDefaultMultiple.after.data.Sample.kt

@@ -0,0 +1,29 @@
+class D {
+    default public object Named {
+
+    }
+}
+
+trait H {
+    default object {
+
+    }
+}
+
+class E {
+    default object {
+        class D {
+            default object {
+                class D {
+                    default object
+                }
+            }
+        }
+    }
+}
+
+class K {
+    default object Default
+
+    class Object
+}

idea/testData/quickfix/migration/classObjectToDefaultMultiple.after.kt

@@ -0,0 +1,19 @@
+// "Replace 'class' keyword with 'default' modifier in whole project" "true"
+
+class A {
+    public default object {
+
+    }
+}
+
+class B {
+    default object {
+
+    }
+}
+
+class C {
+    default object Named {
+
+    }
+}

idea/testData/quickfix/migration/classObjectToDefaultMultiple.before.Main.kt

@@ -0,0 +1,19 @@
+// "Replace 'class' keyword with 'default' modifier in whole project" "true"
+
+class A {
+    public class<caret> object {
+
+    }
+}
+
+class B {
+    class object {
+
+    }
+}
+
+class C {
+    class object Named {
+
+    }
+}

idea/testData/quickfix/migration/classObjectToDefaultMultiple.before.data.Sample.kt

@@ -0,0 +1,29 @@
+class D {
+    default public class object Named {
+
+    }
+}
+
+trait H {
+    default class object {
+
+    }
+}
+
+class E {
+    class object {
+        class D {
+            class object {
+                class D {
+                    class object
+                }
+            }
+        }
+    }
+}
+
+class K {
+    default object Default
+
+    class Object
+}