add: Stepwise Regression

[adi271001]

Describe the algorithm/code

Stepwise regression is a method of fitting a regression model by iteratively adding or removing variables. It is used to build a model that is accurate and parsimonious, meaning that it has the smallest number of variables that can explain the data. Please assign this under Hacktoberfest to me

Do you want to work on this feature?

• I am willing to implement this feature.

[himanshu-03]

Hi @adi271001! 👋🏻
You can start working on this issue! Do let me know if you need any help. ✨

[adi271001]

created pull request and added codes