Add copyright header

src/interfaces/mod.rs

@@ -1,9 +1,23 @@
+// Copyright (C) 2009 The Libphonenumber Authors
+// Copyright (C) 2025 The Kashin Vladislav (Rust adaptation author)
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
 
 use crate::phonemetadata::PhoneNumberDesc;
+
 /// Internal phonenumber matching API used to isolate the underlying
 /// implementation of the matcher and allow different implementations to be
 /// swapped in easily.
-
 pub(crate) trait MatcherApi: Send + Sync {
   /// Returns whether the given national number (a string containing only decimal
   /// digits) matches the national number pattern defined in the given