Replace README.txt with README.md

I verified and applied patch#4 for drupal version 10.0.2.
README.txt file updated to README.md after applying this patch.
Adding screenshots for reference.

Can be moved to RTBC +1

ravi kant → made their first commit to this issue’s fork.

ravi kant → changed the visibility of the branch 8.x-1.3 to hidden.

I have created MR according to patch.
So test on merge request.

Hi ravi kant

I reviewed your MR!3 and the 'Configuration' section is just a copy of README.md template configuration example, it should be the explanation of the module to explain how enabling/disabling the module will affect the site. And in IntroductionThis module should be change to The Hero Banner block module.

Thank you

Updated !3 according to comment.

Need to add new Maintainers in README.md file.

- Mansi Agarwal - [Mansi Agarwal](https://www.drupal.org/u/mansi-agarwal)
- Samata soni - [Samata soni](https://www.drupal.org/u/samata-soni)