Initial commit: Item Interaction Ecosystem plugin (UE5.7)

Server-authoritative, data-driven item/inventory/interaction/carry/equipment/
world-slot/placement/crafting framework. 8 modules, compiles against UE 5.7.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Source/ItemInventory/Public/ItemCraftingLibrary.h

@@ -0,0 +1,38 @@
+// Copyright ExByte Studios. Item Interaction Ecosystem.
+
+#pragma once
+
+#include "CoreMinimal.h"
+#include "Kismet/BlueprintFunctionLibrary.h"
+#include "GameplayTagContainer.h"
+#include "ItemCraftingLibrary.generated.h"
+
+class UInventoryComponent;
+
+/**
+ * Crafting + loot helpers (section 6). All server-authoritative: crafting consumes
+ * inputs and produces the output through the inventory's validated operations;
+ * loot rolls fresh instances from a loot table into a container.
+ */
+UCLASS()
+class ITEMINVENTORY_API UItemCraftingLibrary : public UBlueprintFunctionLibrary
+{
+	GENERATED_BODY()
+
+public:
+	/** True if Inventory holds every ingredient (and the station requirement is met). */
+	UFUNCTION(BlueprintCallable, Category = "Item|Crafting", meta = (WorldContext = "WorldContext"))
+	static bool CanCraft(const UObject* WorldContext, UInventoryComponent* Inventory, FName RecipeId, FGameplayTag AvailableStation);
+
+	/** Server: consume the recipe inputs and add its output. Returns true on success. */
+	UFUNCTION(BlueprintCallable, Category = "Item|Crafting", meta = (WorldContext = "WorldContext"))
+	static bool Craft(const UObject* WorldContext, UInventoryComponent* Inventory, FName RecipeId, FGameplayTag AvailableStation);
+
+	/** Server: roll a loot table and add the results into an inventory. */
+	UFUNCTION(BlueprintCallable, Category = "Item|Loot", meta = (WorldContext = "WorldContext"))
+	static void RollLootIntoInventory(const UObject* WorldContext, UInventoryComponent* Inventory, FName TableId, int32 RollCount);
+
+private:
+	/** Removes Count of ItemId across stacks. Returns true if the full amount was removed. */
+	static bool ConsumeItem(UInventoryComponent* Inventory, FName ItemId, int32 Count);
+};