Implement Bagging Classifier and Regressor

[kwanit1142]

Aim :- Make Bagging convenient according to the Base_Estimator_Model (Linear Regression, Decision Tree, SVMs, etc.) and according to their numbers too.

References :-

https://machinelearningmastery.com/implement-bagging-scratch-python/ <----- (Take Idea for Bagging Samples from here)

Most of the Implementation would be self-done. Still more resources would be tried to brough upon here.

Requirement :-

See KNN as Classifier and Regressor, in models.py, where the mode can be switched by changing the boolean value of the "classify" argument.