Add greetings workflow and a pr template in this project

[hasnainmakada-99]

Is your feature request related to a problem? Please describe.

I would like to add a new greetings workflow and also a pr template to so that new contributors can clearly tell about what the pr is and they should be greeted when creating a new issue or pr

I Would like to contribute to this issue as a part of hacktoberfest

@atapas Sir will you please assign it to me

Describe the solution you'd like
Would like to integrate a new action and pr template

Describe alternatives you've considered
None

Additional context
None

[hargun0360]

I would like to take this up. Could you please assign it to me?