docs: update project structure and fix security issue

- Update main README with correct paths to notebooks/
- Create README in notebooks folder with consistent format
- Update .gitignore to cover all project folders
- Fix medium security error in notebook 03 (remove redundant if/else)

Author: Elizabeth

README.md

@@ -17,7 +17,7 @@ Strands Agents create AI agents with minimal code using built-in tools from the
 | **05** ⭐ | [S3 Vector Memory for Persistent Context](notebooks/05-s3-vector-memory.ipynb) | Build semantic memory with [Amazon S3 Vectors](https://docs.aws.amazon.com/AmazonS3/latest/userguide/s3-vectors.html). Create agents that remember across all sessions with production-ready infrastructure. |
 | **06** 🌍 | [Travel Assistant with Cross-Session Memory](notebooks/06-travel-assistant-demo.ipynb) | Real-world demonstration of cross-session memory with a personalized AI travel assistant. Features multimodal analysis (text, images, PDFs) and progressive personalization. |
 | **07** 🎨 | [Travel Content Generator with Built-in Tools](notebooks/07-travel-content-generator.ipynb) | Generate complete travel content packages (images, videos, itineraries) for any destination using built-in tools from [`strands-agents-tools`](https://pypi.org/project/strands-agents-tools/). Fully automated with no manual confirmations. |
-| **Bonus** 🚀 | [Deploy to Production with AgentCore](deploy-to-production/) | Deploy your multimodal travel agent to production using [Amazon Bedrock AgentCore Runtime](https://docs.aws.amazon.com/bedrock-agentcore/latest/devguide/agents-tools-runtime.html). Includes persistent memory, serverless deployment, and comprehensive testing. |
+| **Bonus** 🚀 | [Deploy to Production with AgentCore](deploy-to-production/) | Deploy your multimodal travel agent to production using [Amazon Bedrock AgentCore Runtime](https://docs.aws.amazon.com/bedrock-agentcore/latest/devguide/agents-tools-runtime.html). Includes persistent memory with [Amazon Bedrock AgentCore Memory](https://docs.aws.amazon.com/bedrock-agentcore/latest/devguide/memory-get-started.html), serverless deployment, and comprehensive testing. |
 
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