[Suggestion] Town "Jackpot" Alerts: Winning Gambled Uniques

When a player gambles and successfully hits a Unique item, a thematic notification should trigger for all players currently in that town instance. Seeing another player win a Headhunter creates an immediate "Winner Effect" and encourages nearby players to spend their gold for a chance at the same luck.

For players that want to opt-out, give a setting to "Disable Jackpot Notifications" from the Options Menu.

We also need a local Slide-Whistle for bad Vaal/Chance Orb/item destruction outcomes.