[✅] Changed default configuration for sellwand.
[✅] Added 5 generator events:

• Sell Multiplier - Upon using /sell command, the value of every item will be increased by (configurable)x multiplier.
• Generator Upgrade - The drop of every generator on the server will be upgraded to x amount configurable tier above.
• Generator Speed - Increased the speed of a generator by a configurable percentage amount.
• Drop Multiplier - Increased the amount of generator drop by a configurable amount.
• (NEW!) Mixed Up - Make every generator generate a drop from a random generator.

[✅] Added multiple placeholders

• %nextgens_total_generator% - Displays the total generator on the server.
• %nextgens_corrupt_time% - Displays the time left before the corruption generator event happens.
• %nextgens_event_name% - Displays the display name of the current event.
• %nextgens_event_time% - Displays the time left of the current event or when the event will happen.