[hooks] Document main functions for library (#2268)

Author: dcharkes

pkgs/hooks/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.19.1-wip
+
+- Added links to the `build` and `link` methods as primary entry points.
+
 ## 0.19.0
 
 - Split up `package:native_assets_cli` in `package:hooks`,

pkgs/hooks/lib/hooks.dart

@@ -2,10 +2,15 @@
 // 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.
 
-/// A library that contains the argument and file formats for implementing a
-/// build hook (`hook/build.dart`).
+/// A library that contains the protocol for implementing hooks.
+///
+/// The main entrypoint for build hooks (`hook/build.dart`) is [build]. The main
+/// entrypoint for link hooks (`hook/link.dart`) is [link].
 library;
 
+import 'src/api/build.dart';
+import 'src/api/link.dart';
+
 export 'src/api/build.dart' show build;
 export 'src/api/builder.dart' show Builder;
 export 'src/api/link.dart' show link;

pkgs/hooks/pubspec.yaml

@@ -3,7 +3,7 @@ description: >-
   A library that contains a Dart API for the JSON-based protocol for
   `hook/build.dart` and `hook/link.dart`.
 
-version: 0.19.0
+version: 0.19.1-wip
 
 repository: https://github.com/dart-lang/native/tree/main/pkgs/hooks