Java v2: Code examples and an end-to-end scenario for Amazon Bedrock Agents (draft)

[DennisTraub]

This pull request adds examples and an end-to-end scenario demonstrating the use of Amazon Bedrock Agents with the AWS SDK for Java v2, using both the sync and async clients respectively.

It includes the following actions for Agents for Amazon Bedrock:

• [X] CreateAgent
• [ ] CreateAgentActionGroup
• [ ] CreateAgentAlias
• [X] DeleteAgent
• [ ] DeleteAgentAlias
• [X] GetAgent
• [X] ListAgents
• [X] ListAgentActionGroups
• [ ] ListAgentKnowledgeBases
• [ ] PrepareAgent

Additionally, it demonstrates the following action for the Amazon Bedrock Agents Runtime:

• [ ] InvokeAgent

Note: The end-to-end scenario mirrors the Bedrock Agents scenario for the Python SDK which has already been reviewed and approved by the service team.

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By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.