add file copyrights (#198)

Author: devoncarew

.github/ISSUE_TEMPLATE/io_file.md

@@ -0,0 +1,5 @@
+---
+name: "package:io_file"
+about: "Create a bug or file a feature request against package:io_file."
+labels: "package:io_file"
+---

.github/labeler.yml

@@ -12,6 +12,10 @@
   - changed-files:
     - any-glob-to-any-file: 'pkgs/gcloud/**'
 
+'package:io_file':
+  - changed-files:
+    - any-glob-to-any-file: 'pkgs/io_file/**'
+
 'package:native_synchronization':
   - changed-files:
     - any-glob-to-any-file: 'pkgs/native_synchronization/**'

CODEOWNERS

@@ -5,4 +5,5 @@
 
 /pkgs/appengine/               @dart-lang/dart-pub-team
 /pkgs/gcloud/                  @dart-lang/dart-pub-team
+/pkgs/io_file                  @brianquinlan
 /pkgs/native_synchronization/  @mraleph

pkgs/io_file/README.md

@@ -18,4 +18,3 @@ much higher expected rate of API and breaking changes.
 Your feedback is valuable and will help us evolve this package. For general
 feedback, suggestions, and comments, please file an issue in the 
 [bug tracker](https://github.com/dart-lang/labs/issues).
-

pkgs/io_file/example/io_file_example.dart

@@ -1,3 +1,7 @@
+// Copyright (c) 2025, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 import 'package:io_file/io_file.dart';
 
 void main() {

pkgs/io_file/lib/io_file.dart

@@ -1,3 +1,7 @@
+// Copyright (c) 2025, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 /// Support for doing something awesome.
 ///
 /// More dartdocs go here.

pkgs/io_file/lib/src/io_file_base.dart

@@ -1,3 +1,7 @@
+// Copyright (c) 2025, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 // TODO: Put public facing types in this file.
 
 /// Checks if you are awesome. Spoiler: you are.

pkgs/io_file/test/io_file_test.dart

@@ -1,3 +1,7 @@
+// Copyright (c) 2025, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 import 'package:io_file/io_file.dart';
 import 'package:test/test.dart';