update docs : mention about GUI version for the same

[coderatul]

create a features section add about existence of GUI version and other features

[BkPankaj]

Hello @coderatul there is already feature section. I am interested in your project can you just provide this clarification.

[coderatul]

Hello @coderatul there is already feature section. I am interested in your project can you just provide this clarification.

yes GUI has a feature section; i want to add a feature section for email bomber CLI which says we have GUI version of email bomber too, as a feature and other features (you may refer to release for other features) to have a look on other features