sashite-snn 3.0.0

SNN (Style Name Notation) provides a rule-agnostic, scalable naming system for identifying abstract strategy board game styles. This gem implements the SNN Specification v1.0.0 with a modern Ruby interface featuring immutable style name objects and functional programming principles. SNN uses canonical ASCII names (e.g., "Shogi", "Go9x9") to unambiguously refer to game styles across variants and traditions. Ideal for engines, protocols, and tools that need clear and extensible style identifiers.