Feature request: Support Bedrock AgentCore Runtime deployment

### Describe your idea/feature/enhancement
Support Bedrock AgentCore Runtime as a target platform for deployment for agentic implementations.

### Proposal
With the recently announced support for [direct code-zip file deployment](https://aws.amazon.com/about-aws/whats-new/2025/11/amazon-bedrock-agentcore-runtime-code-deployment/) for AgentCore Runtime I think it would make sense to support it in the sam cli (and hence simplify build and deployment)

Things to consider:
1. Will this require any updates to the [SAM Spec](https://github.com/awslabs/serverless-application-model): Possibly, but not necessarily, it would be nice to have first class support for its primitives, but maybe it could be added in a second phase.