(CodeDeploy): (I want to make it easy to integrate CodeDeploy and Chatbot (I want to support CodeDeploy in aws_codestarnotifications.INotificationRuleSource).)

### Describe the feature

CodeDeploy is not supported in cdk.aws_codestarnotifications.INotificationRuleSource. Therefore, it is very difficult to integrate CodeDeploy and Chatbot.

I would like to be able to specify CodeDeploy as the source in cdk.aws_codestarnotifications.NotificationRule, or introduce an easy way to do Chatbot notifications to CodeDeploy in some other way.

### Use Case

Easily define notifications to Slack, such as when using CodeDeploy for ECS Deploy and defining it in CDK.

### Proposed Solution

_No response_

### Other Information

_No response_

### Acknowledgements

- [ ] I may be able to implement this feature request
- [ ] This feature might incur a breaking change

### CDK version used

2.86.0

### Environment details (OS name and version, etc.)

OS X

Start by tracing cdk.aws_codestarnotifications.INotificationRuleSource and NotificationRule, then compare how existing AWS service sources are represented. Define what support for CodeDeploy notifications to Chatbot should expose and verify that CodeDeploy can be accepted as a source without breaking existing notification integrations.

Written by the indexing model from the issue text.