[python] added section "Generative AI"

Created a new section in python for "Generative AI". 

Added a tutorial (colab notebook) for using LLaMA Guard -  an LLM-based input-output safeguard model. 

(Plan to add more tutorials in the section for working with LLMs and generative AI image and audio models)

Author: tanya-rai

README.md

@@ -416,6 +416,10 @@ To get started, simply fork this repo. Please refer to [CONTRIBUTING.md](CONTRIB
   - [Part 5: Deep Dream in TensorFlow](https://www.youtube.com/watch?v=MrBzgvUNr4w&list=PL2-dafEMk2A6QKz1mrk1uIGfHkC1zZ6UU&index=5)
   - [Part 6: Genetic Algorithms](https://www.youtube.com/watch?v=dSofAXnnFrY&index=6&list=PL2-dafEMk2A6QKz1mrk1uIGfHkC1zZ6UU)
 
+### Generative AI:
+
+- [Safety Guardrails for LLMs: LLaMA Guard Tutorial](https://colab.research.google.com/drive/1CfF0Bzzkd5VETmhsniksSpekpS-LKYtX)
+
 ### Machine Learning:
 
 - [Write Linear Regression From Scratch in Python](https://www.youtube.com/watch?v=uwwWVAgJBcM) (video)