Changelog v1.6.0

• 🌍 Multi-language support — set language: "en" or "de" in config.yml
• 📁 Two language folders (English/German), new installs default to English
• 🔄 Old messages.yml auto-migrated to the new language structure, nothing lost
• 🛠️ /dt maintenance cancel can now also reopen a dimension stuck in maintenance
• 🧹 config.yml cleaned up — settings only, no more text, ready to be shared publicly