Attributification [Attribute Unification]

Added

• Added Fabric support (mod now works on both Fabric and Forge)
• Added in-game configuration GUI powered by fzzy_config
• Added automatic migration from old JSON config to new TOML format
• Added client-server config synchronization
• Added unidirectional configuration field (replaces old bidirectional with inverted logic)

Changed

• Major refactoring: Migrated to fzzy_config library for configuration management
• Config format changed from JSON to TOML
• Config file location: config/attributification/attributification.toml (was attribute_mappings.json)
• Old JSON config is automatically backed up to attribute_mappings.json.old after migration
• BREAKING: Replaced bidirectional field with unidirectional (inverted logic, default: false)
  • Old: bidirectional: true (default) → New: unidirectional: false (default)
  • Old: bidirectional: false → New: unidirectional: true
  • Migration handles this automatically