Update README.md file according to README.md template

Hi,

I reviewed the MR

It follows all standards of this documentation - https://www.drupal.org/docs/develop/managing-a-drupalorg-theme-module-or... →

1. It contains introduction at the top with module name
2. Table of contents are added properly
3. Requirements and Installation procedure is given properly

The MR looks good to me.

Thanks for the work.