PoE2 Trade Weight Autofill

Adds conservative normalized default weights to Path of Exile 2 Trade weighted-sum searches.

Adds two focused upgrades to the official Path of Exile 2 trade site: automatic Weighted Sum stat weights and a direct PoE2DB shortcut for the current item search. The extension can fill trade weights from maintained stat maximums and opens the relevant PoE2DB modifier page for the selected item category. For armour types like helmets, gloves, boots, body armours, and shields, it also detects Armour, Evasion, and Energy Shield filters to route to the correct subtype page automatically.