Major update with complete code rewrite!

NEW FEATURES:
- Automatic Item Collection - All ground items are collected into The Void when it opens
- World Whitelist/Blacklist - Control which worlds the plugin operates in
- Custom Commands - Set your own main command and aliases in config.yml (/abyss, /trash, /void, /otchlan, etc.)
- Configurable Reminders - Define multiple reminder times (e.g., 15, 10, 5, 1 minutes before opening)
- Despawn Protection - Optionally save items before they despawn
- Admin Commands - /abyss open, /abyss close, /abyss status

IMPROVEMENTS:
- Complete code refactor for better performance
- Modular architecture with separate managers
- Full Minecraft 1.21.x compatibility
- Tab completion for all commands
- Better error handling and logging

CONFIGURATION:
- New reminders list in config.yml
- New worlds section with mode (whitelist/blacklist) and list
- New mainCommand and aliases options
- Items now collected at moment of opening, not periodically

NOTE: Command aliases require server restart to update. Other settings reload instantly with /abyss reload.

Full documentation on the main resource page.