Move File/Change Package: Change package directive prior to processing of internal usages (otherwise some necessary imports are not added)

idea/testData/refactoring/move/kotlin/moveFile/addExtensionImport/addExtensionImport.test

@@ -0,0 +1,5 @@
+{
+  "mainFile": "source/foo.kt",
+  "type": "MOVE_FILES",
+  "targetPackage": "target"
+}

idea/testData/refactoring/move/kotlin/moveFile/addExtensionImport/after/source/bar.kt

@@ -0,0 +1,7 @@
+package source
+
+import target.C
+
+fun C.foo() {
+
+}

idea/testData/refactoring/move/kotlin/moveFile/addExtensionImport/after/target/foo.kt

@@ -0,0 +1,9 @@
+package target
+
+import source.foo
+
+class C
+
+fun test(c: C) {
+    c.foo()
+}

idea/testData/refactoring/move/kotlin/moveFile/addExtensionImport/before/source/bar.kt

@@ -0,0 +1,5 @@
+package source
+
+fun C.foo() {
+
+}

idea/testData/refactoring/move/kotlin/moveFile/addExtensionImport/before/source/foo.kt

@@ -0,0 +1,7 @@
+package source
+
+class C
+
+fun test(c: C) {
+    c.foo()
+}