CookieClickerZ

Changes:

• Added leaderboard placeholders
• Added option to set the custom model data for upgrade items to apply custom textures
• Added option for commands to be executed when a player unlocks a prestige level
• Added options to change the head textures of the achievement category heads
• Added option to buy 1, 10, or max upgrades at once
• Added /ccdebug command for generating debug reports (zetacore integration)
• Fixed upgrade prices being calculated wrong when going above long limits