Major Update: Shop, Notifications & Music

🎮 Level-Up Rewards

• Users automatically receive Coins on Level-Up
• Reward: Level x 100 Coins
• Reward displayed in Level-Up embed

🛒 Shop System

• Server admins can create a Shop on the homepage
• Items with: Name, description, price, stock, role reward, image
• Users can view the shop with /shop view
• Purchase with /shop buy - coins are deducted
• Roles are automatically assigned (if configured)
• Purchase history visible in admin panel

🔔 YouTube/Twitch Notifications (No API Keys)

• YouTube: RSS feed polling, no API keys required
• Twitch: GraphQL API with public client ID
• Automatic notifications for new videos/livestreams
• Role ping configurable
• Enable/disable per channel

🎵 Music Improvements

• yt-dlp integration for YouTube search and URL playback
• Support for YouTube and SoundCloud links
• Auto-Play: Links in chat are automatically added to queue
• ffmpeg installed on server

📋 Changelog Archive

• Only the latest 3 entries shown on main page
• Older entries hidden in archive section
• Toggle button to show/hide archive

🔧 Database

• New tables: shop_items, shop_purchases
• New columns: notification_channels.last_video_id, last_live_status