Adding stack function

[Nish251103]

Description

i added a stack function of list. It.s a new feature to be used over a list as a basic function the function like push, pop, peek, display

Related Issue

This PR closes #

Motivation and Context

It helps to perform stacks in a list like push, pop, peek and display

Screenshots (if any)

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] My code follows the code style of this project.
• [x] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.

[SVijayB]

Hey, please do not modify the pull_request_template.md file. Remove that and I will merge your PR.

[Nish251103]

sure

[Nish251103]

Done the needful Kindly check

[SVijayB]

Thanks for the PR! I've merged 👍

[Nish251103]

Okay thank you