Add readme badges

Author: djcopley

README.md

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+[![PyPI version](https://badge.fury.io/py/shelloracle.svg)](https://badge.fury.io/py/shelloracle)
+[![PyPI Supported Python Versions](https://img.shields.io/pypi/pyversions/shelloracle.svg)](https://pypi.python.org/pypi/shelloracle/)
+[![Downloads](https://static.pepy.tech/badge/shelloracle/month)](https://pepy.tech/project/shelloracle)
+
 # ShellOracle
 
 ShellOracle is an innovative terminal utility designed for intelligent shell command generation, bringing a new level of