Replaced `.single()` with `.maybeSingle()` in multiple command files to handle cases where no record is found, and added a new /pricing route and navigation links to the UI.
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Adds a comprehensive achievement system to the bot, including new triggers for various user actions, the ability to create, manage, and view achievements, and integration with existing XP and leveling systems. This also involves updating user statistics tracking to support achievement triggers.
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Introduce several new slash commands including ban, kick, timeout, and userinfo. Enhance existing commands like config and rank with new features and configurations. Add new listeners for welcome and goodbye messages. Implement XP tracking for user leveling and integrate it with role rewards. Update documentation to reflect these changes.
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