Added - Broadcast Notifications System

• Global Broadcast Notifications for auction events

  • Broadcast when players list items for auction
  • Broadcast when players purchase items
  • Clickable "View Auction" link in listing broadcasts
  • Beautiful hex-colored messages with emojis

• BroadcastManager Service

  • Centralized broadcast management
  • Configurable broadcast ranges (GLOBAL, WORLD, NONE)
  • Individual toggles for listing and purchase broadcasts
  • Smart player name resolution for offline sellers
  • World-based broadcasting support

Configuration Options

auction:
  broadcast:
    enabled: true           # Master toggle
    on-listing: true        # Broadcast new listings
    on-purchase: true       # Broadcast purchases
    range: GLOBAL          # GLOBAL, WORLD, or NONE

Broadcast Messages

• Item Listed: Shows player, item name, quantity, and price with clickable link
• Item Purchased: Shows buyer, seller, item, quantity, and price

Technical Implementation

• Integrated BroadcastManager into PlayerAuction main class
• Broadcasts triggered from AuctionCommand (/ah sell)
• Broadcasts triggered from AuctionService (purchase completion)
• MiniMessage support for rich text formatting
• Click events for interactive messages
• Proper thread handling (main thread for Bukkit operations)

Benefits

• Server Activity: Players see active marketplace
• Price Discovery: Players learn market prices
• Engagement: Encourages trading and competition
• Transparency: All trades are visible to community
• Configurable: Can disable per feature or globally

---