Simple Trains

v1.2.0: Add complete messages system for full customization

• Added messages.yml with 100+ customizable messages
• Added Messages.java utility class for message handling
• All plugin text is now configurable (commands, GUI, errors)
• Support for color codes and placeholders (%STATION%, %PLAYER%, etc.)
• Updated README with new documentation and changelog
• GUI titles, item names, and lore are all editable