Summary

Closes #2797

• Replaces the boolean VISITOR_TRIGGER_RAID world setting with a new RAID_TRIGGER island protection flag
• Island owners can now set the minimum rank required to trigger a raid (owner, member, trusted, visitor, etc.) via the island settings panel — defaults to member rank
• Players below the configured rank have their raid attempt blocked (Bad Omen is not consumed)
• Removes VisitorsStartingRaidListener and adds the simpler RaidTriggerListener (uses standard checkIsland rank checking)
• Updates all 23 locale files with the new RAID_TRIGGER key and fresh translations
• Adds RaidTriggerListenerTest

Test plan

• Verify that a visitor with Bad Omen on a member-rank island cannot trigger a raid
• Verify that a member with Bad Omen can trigger a raid
• Verify the island owner can lower the rank to visitor in the settings panel, after which visitors can also trigger raids
• Verify the island owner can raise the rank to owner, blocking members from triggering raids
• Confirm the old VISITOR_TRIGGER_RAID key no longer appears in any locale or flag list
• Run ./gradlew test — all tests pass

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