Implement Logistic Regression classifier

[asingh1098]

Currently, we have only used KNN classification to predict whether the given input x-ray image belongs to a covid patient. In order to expand our knowledge about classification we, in our last group meeting on 03/12/2021, decided to use other popular classification techniques/approaches so that not only it would improve our decision-making skills about choosing an appropriate classifier, under different circumstances, later in the future but also it would facilitate us to make a prediction comparison table which can be presented later during our project presentation.

[asingh1098]

This is the branch to address this issue.