GUIShop

Add Built-in Dynamic Pricing System

Dynamic Pricing:

• Added built-in supply/demand pricing system that works out of the box
• Prices increase when items are bought (supply decreases)
• Prices decrease when items are sold (supply increases)
• Prices gradually normalize back to base values over time
• External plugins can still override via DynamicPriceProvider API

Configuration:

• Created dynamicpricing.yml for all dynamic pricing settings
• Simplified config.yml to just dynamic-pricing: true/false
• Added per-item dynamic: false config key to exempt specific items

Admin Commands:

• /gs market status - View dynamic pricing system status
• /gs market info <item> - Check an item's current market status
• /gs market reset <item> - Reset an item to base price
• /gs market resetall - Reset all items to base prices
• Added tab completion for all market commands

Help and Tab Completion:

• Added eco and market commands to /gs help output
• Added tab completion for /gs market subcommands
• Added material name suggestions for /gs market info/reset

Documentation:

• Created wiki/Dynamic-Pricing.md with full documentation
• Updated wiki/Commands-and-Permissions.md with market commands
• Updated wiki/API-Documentation.md with Dynamic Pricing API
• Updated spigot.bbcode, modrinth.md, and dev-bukkit.html

Technical:

• Added DynamicPricingManager class with SQLite persistence
• Added shouldUseDynamicPricing() convenience method on Item
• Data stored in plugins/GUIShop/Data/dynamic_pricing.db
• Added dynamicpricing.yml to pom.xml resources