[Stencils] Add Amazon Bedrock AgentCore icon to AWS19 shape library

[sundargthb]

• [ x] I agree to follow the Code of Conduct that this project adheres to.
• [ x] I have searched the issue tracker for a feature request that matches the one I want to file, without success.

Is your feature request related to a problem? Please describe.
Amazon Bedrock AgentCore is a generally available AWS service (GA since October 2025) for building, deploying, and operating AI agents securely at scale. It is part of the Artificial Intelligence service category on AWS. Users creating architecture diagrams for agentic AI workloads cannot find a Bedrock AgentCore icon in the draw.io AWS19 / AWS 2026 shape library, forcing them to use generic placeholders or manually import SVGs.

Describe the solution you'd like
Please add the official Amazon Bedrock AgentCore architecture icon to the AWS19 / 2026 shape library under the Artificial Intelligence category, alongside existing icons like Amazon Bedrock, Amazon SageMaker, etc.
The icon is included in the official AWS Architecture Icons Asset Package at https://aws.amazon.com/architecture/icons/ under Architecture-Service-Icons > Arch_Artificial-Intelligence with the naming convention:

Arch_Amazon-Bedrock-AgentCore_16.svg
Arch_Amazon-Bedrock-AgentCore_32.svg
Arch_Amazon-Bedrock-AgentCore_48.svg
Arch_Amazon-Bedrock-AgentCore_64.svg

I have attached a ZIP containing all four Light-background SVG sizes.

Describe alternatives you've considered

• Importing the SVG as a per-user custom library — doesn't help the broader community and creates inconsistent diagrams across teams
• Using the generic Amazon Bedrock icon — doesn't distinguish AgentCore from other Bedrock capabilities

Additional context
AWS product page: https://aws.amazon.com/bedrock/agentcore/
Service documentation: https://docs.aws.amazon.com/bedrock-agentcore/
GA announcement (Oct 2025): https://aws.amazon.com/about-aws/whats-new/2025/10/amazon-bedrock-agentcore-available/
Available in 9 AWS Regions
Category: Artificial Intelligence (same as Amazon Bedrock, Amazon SageMaker, etc.)
The icon follows standard AWS Architecture Icon conventions

I represent the Amazon Bedrock AgentCore product team at AWS and can provide any additional assets or information needed.

Arch_Amazon-Bedrock-AgentCore_16.zip