chore(app-delivery): deprecate @aws-cdk/app-delivery

packages/@aws-cdk/app-delivery/README.md

@@ -2,9 +2,9 @@
 <!--BEGIN STABILITY BANNER-->
 ---
 
-![cdk-constructs: Experimental](https://img.shields.io/badge/cdk--constructs-experimental-important.svg?style=for-the-badge)
+![Deprecated](https://img.shields.io/badge/deprecated-critical.svg?style=for-the-badge)
 
-> The APIs of higher level constructs in this module are experimental and under active development. They are subject to non-backward compatible changes or removal in any future version. These are not subject to the [Semantic Versioning](https://semver.org/) model and breaking changes will be announced in the release notes. This means that while you may use them, you may need to update your source code when upgrading to a newer version of this package.
+> This API may emit warnings. Backward compatibility is not guaranteed.
 
 ---
 <!--END STABILITY BANNER-->
@@ -13,6 +13,13 @@ This library includes a *CodePipeline* composite Action for deploying AWS CDK Ap
 
 This module is part of the [AWS Cloud Development Kit](https://github.com/aws/aws-cdk) project.
 
+
+# Replacement recommended
+
+This library has been deprecated. We recommend you use the
+[@aws-cdk/pipelines](https://docs.aws.amazon.com/cdk/api/latest/docs/pipelines.html) module instead.
+
+
 ### Limitations
 The construct library in it's current form has the following limitations:
 1. It can only deploy stacks that are hosted in the same AWS account and region as the *CodePipeline* is.

packages/@aws-cdk/app-delivery/package.json

@@ -92,8 +92,8 @@
   "engines": {
     "node": ">= 10.13.0 <13 || >=13.7.0"
   },
-  "stability": "experimental",
-  "maturity": "experimental",
+  "stability": "deprecated",
+  "maturity": "deprecated",
   "nyc": {
     "statements": 75
   },