IP Ban Plugin

Added

• JSON Storage: Replaced SQLite with a lightweight JSON-based storage system.
• Async I/O: All file operations (save/load) are now performed asynchronously to prevent server lag.
• Cyrillic Support: Enforced UTF-8 encoding for messages.properties and banned_ips.json to correctly handle Cyrillic characters in ban reasons and messages.

Changed

• Plugin ID: Renamed plugin ID to ipbanplugin and main class to IPBanPlugin.
• Dependency Removal: Removed sqlite-jdbc dependency to drastically reduce file size.
• File Size: Optimized plugin size from ~13MB to ~350KB.
• Velocity API: Updated to target Velocity 3.4.0-SNAPSHOT.

Fixed

• Encoding Issues: Fixed issues where Cyrillic characters might appear as question marks or garbage text.
• Java 9+ Compatibility: Removed complex classloader hacks required for SQLite, ensuring better compatibility with modern Java versions (Java 17+).