MythicSkywars

Nightly Build - may be unstable.\n\nCommit: fb4d6947481285073f67a4027eec3db45f0479e9\n\nfix(listeners,managers): move menu open into async task and improve material detection

• Move ArenaSetupMenu.open() call inside async task in ChatListener to ensure it executes after gMap.update() completes
• Apply fix to both name and creator setting branches for consistency
• Refactor isSolidOrLiquid() to use string matching for water and lava detection instead of checking deprecated material constants
• Improve null safety with early return in material detection logic