Missing PR template

[Anshika-Jain02]

Addition of Pull Request Template to improve clarity and to make it easier for new contributors.

Please assign this issue to me under GSSoC'23 @animator

[animator]

Hi @Anshika-Jain02 ,

Thanks for your interest in making meaningful contribution to this project.
Please go through FAQs & Getting Started Guide for GSSoC students to get started with your first contribution to this project.
Closing this issue as we have already outlined how to create a PR in the Contributing Guide.

Thanks.