Create a scheduled cloud task that cleans up expired rows in UserInvite

[MatoPlus]

This should be a weekly job that checks for any invite that has been more than 2 weeks old, if so remove them.

Similarly, if any invites older than 1 week, remind them to accept the invite.

Technical Notes:

• For this ticket, create a function to initialize firebase cloud functions
• Start a fire base cloud function project with firebase init functions
• Look into creating a cloud function that runs weekly
• For all user invites that are between 1 <= age <= 2 weeks old, send them an reminder (for now, just print them in the console)
• For all user invites that are over 2 weeks old, remove them from the database via prisma
• https://firebase.google.com/docs/functions/schedule-functions
• good tutorial: https://www.freecodecamp.org/news/how-to-schedule-a-task-with-firebase-cloud-functions/

[MatoPlus]

Actually, I think a cleaner solution for deleting expired rows would be using lazy cleanup, whenever we access expired rows, delete them and return error. However, we will still face an issue with reminder emails