Set new frequency for dropping server currency#703

Hey MiMu devs! 👋
It’d be super helpful if server admins could set a custom frequency for when the server currency drops. Right now, it feels a bit rigid — some servers might want more frequent drops to keep engagement high, while others might want to slow it down to balance the economy.
Feature Idea:
Let us set a timer (e.g. every 10 mins, 30 mins, 1 hour) for how often the bot drops currency in chat or based on activity. Maybe even add a randomizer option for variety! 🎲