stella v1.0.0

stella v1.0.0 Change Log:

• feat: teams with priorities — highest-priority team is the player's main team
• feat: per-team hex colors (#RRGGBB)
• feat: member targeting — single players, @all, @online, @team:<id>
• feat: LuckPerms sync — mirror team membership to permission groups
• feat: scoreboard hook — reflect teams as vanilla scoreboard teams
• feat: auto-team on join, with bypass permission
• feat: PlaceholderAPI support — 21 placeholders
• feat: configurable messages (messages.yml)
• feat: developer API (StellaAPI) with cancellable team events
• feat: Modrinth update checker
• feat: UUID-based storage — memberships survive name changes