PyPI dpctl project description needs changes

[samaid]

For project description please use Intro text I suggested for README.MD. Remove everything else from there, and instead provide the link to github.io documentation

[diptorupd]

@samaid @oleksandr-pavlyk We have refactored the README. Can you review the latest README and see if the description is better?

[oleksandr-pavlyk]

Closing due to vague issue description, and lack of activity.