docs: update README.md

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README.md

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 Image Processing Library from scratch using Python.
 
+[![Documentation Status](https://readthedocs.org/projects/imgcv/badge/?version=latest)](https://imgcv.readthedocs.io/en/latest/?badge=latest)
+[![PyPI version](https://badge.fury.io/py/imgcv.svg)](https://badge.fury.io/py/imgcv)
+[![License](https://img.shields.io/badge/License-MIT-blue.svg)](https://opensource.org/licenses/MIT)
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 > NOTE: This library is just a fun project to learn about image processing and computer vision algorithms from scratch and to enhance my understanding of the concepts. 
 
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