Add Runtime Feature Flag System to FoliaCore with Enable/Disable Commands

[GoodrichDev]

Feature Description

Implement a dynamic feature flag system within the FoliaCore plugin that supports in-game enabling and disabling of specific features without requiring a server restart. The system should include commands like /foliacore enable <feature> and /foliacore disable <feature>, as well as a /foliacore reload to reload configuration changes. Each listener or feature module, such as DoggySteakListener, will check the flag status before executing logic—skipping or cancelling behavior if the feature is disabled.

Why This Feature Should Be Added

This system would make managing and testing features significantly more efficient. Server administrators would gain real-time control over specific functionalities, allowing quick hotfixes, testing, and feature rollouts without interrupting gameplay. It would also help in debugging and isolating problem areas by disabling individual components safely during runtime.

Potential Implementation Details

• Create a central FeatureFlagManager in FoliaCore that loads flags from a YAML or JSON config.
• Provide getter methods like isFeatureEnabled("doggy-steak") for use in listeners.
• Add commands:
  • /foliacore enable <flag>
  • /foliacore disable <flag>
  • /foliacore reload to re-read the config and apply changes.
• In listeners like DoggySteakListener, check the flag before proceeding:

  if (!FeatureFlagManager.isEnabled("doggy-steak")) {
      event.setCancelled(true);
      return;
  }