Add a 24h expiration to Available to Battle role calls

[MegaMasterX]

Lucky and Mars have requested a 24h expiration for ATB roles added to users. This likely can be completed by keeping an onboard list of users that actively have the ATB value with a struct containing when the user obtained the role and every day at 1am EST, any user over 24 hours prior should have the role removed automatically outside of a gateway driven call.

This command should also be admin-editable with #31