Palindromestring added

[Leoperon]

Description

Write a program that takes an English word and test whether or not this word is a palindrome. (e.g. a word that reads the same both forwards and backwards such as “level”). ### Related Issue

This PR closes #

Checklist:

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

[SVijayB]

Hey! Thanks for the PR! Merged your pull request 👍