feat(bedrockprompt): add prompt management to bedrock agents

[dineshSajwan]

Issue # (if applicable)

Closes #.

Reason for this change

This change adds comprehensive support for Amazon Bedrock Prompt Management to the aws-bedrock-alpha package.

Description of changes

Amazon Bedrock Prompt Management allows users to create, save, and version prompts to streamline AI workflows and ensure consistent prompt usage across different applications.

Prompt Construct : Main construct for creating and managing Bedrock prompts with support for multiple variants.

Prompt Variants: Three types of prompt variants:
TextPromptVariant: Simple text-based prompts with variable substitution
ChatPromptVariant: Conversational prompts supporting system messages, message history, and tool configurations
AgentPromptVariant: Prompts designed for integration with Bedrock Agents

Prompt Versioning : PromptVersion construct for creating immutable snapshots of prompts

Tool Configuration : Support for tool choice and tool specifications in chat prompts

Prompt Routing : Integration with Amazon Bedrock intelligent prompt routing for cost optimization

Describe any new or updated permissions being added

bedrock:GetPrompt - Required to retrieve prompt details (granted via grantGet() method)

Description of how you validated changes

Added Unit test and Integration test.

Checklist

• My code adheres to the CONTRIBUTING GUIDE and DESIGN GUIDELINES

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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

[aws-cdk-automation]

AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: c91d58d
• Result: FAILED
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[aws-cdk-automation]

This PR cannot be merged because it has conflicts. Please resolve them. The PR will be considered stale and closed if it remains in an unmergeable state.