Document the use of rewrite.yml

rewrite.yml

@@ -1,3 +1,21 @@
+#
+# Copyright 2024 the original author or authors.
+# <p>
+# 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
+# <p>
+# https://www.apache.org/licenses/LICENSE-2.0
+# <p>
+# 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.
+#
+---
+# Apply a subset of best practices to OpenRewrite recipes; typically run before committing changes.
+# Any differences produced by this recipe will result in code suggestion comments on pull requests.
 ---
 type: specs.openrewrite.org/v1beta/recipe
 name: org.openrewrite.recipes.OpenRewriteBestPracticesSubset