Add referral mechanism

[ramitbuilds]

We can add a referral mechanism for users.

When i will be allowed to work on #107 issue, after completing that, we can add a referral system so users can earn free credits on referrals. this will help in both:

• user experience will be good
• we will gain more users

[ramitbuilds]

@abhro05 i want to work on this as SSoC26

[github-actions]

👋 Hello @ramitbuilds! Thanks for opening this issue and showing interest in contributing to the project.

Please sit back and relax a bit until this issue gets assigned to you. A maintainer will review it shortly.

In the meantime, feel free to check out our Contributing Guidelines. Happy coding! 🚀

[abhro05]

@ramitbuilds just explain the implementation and I'll assign all the three issues.

[ramitbuilds]

@abhro05 when we will add subscription, the subscription will give users credits to use the program so what we can do is add a referral system so users can invite their friends and earn free credits so it will help them too and us too!

[abhro05]

@ramitbuilds assigned to you!!