Add AgentCore browser tool tutorials including captcha and sensitive information handling and integration with Strands Agent

**Describe the tutorial request**
A clear and concise description of what is being requested.
I have created comprehensive AgentCore browser tool tutorials that demonstrate advanced web automation scenarios including:

- Captcha handling and solving techniques
- Sensitive information management and security best practices
- Integration with Strands Agent for enhanced automation workflows
- Complete end-to-end examples with practical implementations

These tutorials fill a gap in the current documentation by providing real-world examples of complex browser automation scenarios that developers commonly encounter, specifically focusing on security-conscious web automation and agent integration patterns.

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I have developed comprehensive tutorials demonstrating integration of Bedrock AgentCore browser tool with various agentic frameworks:

## Tutorials Included:

### 1. Captcha Handling Tutorials
Integration of Bedrock AgentCore browser tool with captcha handling across multiple frameworks:
- **Strands Agent**: Captcha solving with Strands integration
- **Browser-Use**: Captcha handling using browser-use framework
- **LlamaIndex**: Captcha solving with LlamaIndex integration

### 2. Sensitive Information Handling Tutorials
Secure handling of sensitive data across multiple frameworks integrated with Bedrock AgentCore:
- **Browser-Use**: Secure credential management
- **LlamaIndex**: Sensitive data handling patterns
- **NovaAct**: Security best practices
- **Strands Agent**: Secure information processing

### 3. Bedrock AgentCore Browser Tool Integration
Complete integration examples showing how to connect Bedrock AgentCore browser tool with external agentic frameworks, providing production-ready integration patterns.

## Value:
These tutorials provide practical, framework-specific examples for developers working with Bedrock AgentCore browser tool across different agentic ecosystems, addressing real-world automation challenges with security considerations.

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**Is this feature already supported by the AgentCore service?**
- [x] Yes
- [ ] No

If `yes`, please provide any appropriate documentation link.

The AgentCore browser tool supports web automation capabilities, but comprehensive tutorials showing integration with external agentic frameworks (Strands, Browser-Use, LlamaIndex, NovaAct) for captcha handling and sensitive information management are missing from the current documentation.

Existing AgentCore browser tool documentation:
https://docs.aws.amazon.com/bedrock-agentcore/latest/devguide/browser-tool.html
https://aws.amazon.com/bedrock/agentcore/