Move Declarations: Add intention which moves top-level declaration to the separate file in the same directory and package

#KT-4936 Fixed

idea/resources/intentionDescriptions/MoveDeclarationToSeparateFileIntention/after.kt.template

@@ -0,0 +1,13 @@
+// File: foo/bar/myFile.kt
+package foo.bar2
+
+fun test() {
+
+}
+
+// File: foo/bar/test.kt
+package foo.bar2
+
+class Test {
+
+}