docs: enhance README with additional badges

- Add Black code style badge
- Add Ruff linting badge
- Add PRs welcome badge
- Add Hugging Face Spaces badge

README.md

@@ -5,6 +5,10 @@
 [![CI](https://github.com/ayushm98/cascade/actions/workflows/ci.yml/badge.svg)](https://github.com/ayushm98/cascade/actions/workflows/ci.yml)
 [![Python 3.11+](https://img.shields.io/badge/python-3.11+-blue.svg)](https://www.python.org/downloads/)
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
+[![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
+[![Ruff](https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/astral-sh/ruff/main/assets/badge/v2.json)](https://github.com/astral-sh/ruff)
+[![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](CONTRIBUTING.md)
+[![Hugging Face Spaces](https://img.shields.io/badge/🤗%20Hugging%20Face-Spaces-blue)](https://huggingface.co/spaces)
 
 ## Overview