Adds Autogen agent notebook (#98)

* loads review content into redis

* stringifies json reviews

* autogen agent writes its review to markdown

* includes transformers dependency

* includes openai dependency

* corrects silly cell execution error

* why is sentence_transformers not already included?

* includes new autogen notebook in README

* adds more markdown descriptions

Author: justin-cechmanek

README.md

@@ -127,6 +127,7 @@ AI gateways manage LLM traffic through a centralized, managed layer that can imp
 | 👥 **CrewAI Agents** - Notebook to get started with CrewAI and lang-graph | [![Open In GitHub](https://img.shields.io/badge/View-GitHub-green)](python-recipes/agents/01_crewai_langgraph_redis.ipynb) | [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/redis-developer/redis-ai-resources/blob/main/python-recipes/agents/01_crewai_langgraph_redis.ipynb) |
 | 🧠 **Memory Agent** - Building an agent with short term and long term memory using Redis | [![Open In GitHub](https://img.shields.io/badge/View-GitHub-green)](python-recipes/agents/03_memory_agent.ipynb) | [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/redis-developer/redis-ai-resources/blob/main/python-recipes/agents/03_memory_agent.ipynb) |
 | 🛠️ **Full-Featured Agent** - Notebook builds full tool calling agent with semantic cache and router | [![Open In GitHub](https://img.shields.io/badge/View-GitHub-green)](python-recipes/agents/02_full_featured_agent.ipynb) | [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/redis-developer/redis-ai-resources/blob/main/python-recipes/agents/02_full_featured_agent.ipynb) |
+| 🥗 **Autogen Agent** - Builds a blog writing agent with Autogen and Redis memory | [![Open In GitHub](https://img.shields.io/badge/View-GitHub-green)](python-recipes/agents/04_autogen_agent.ipynb) | [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/redis-developer/redis-ai-resources/blob/main/python-recipes/agents/04_autogen_agent.ipynb) |
 
 ### Computer Vision
 | Recipe | GitHub | Google Colab |