Adds support for scripts for item use handling.

Signed-off-by: Deukhoofd <Deukhoofd@gmail.com>

src/Battling/ScriptHandling/ItemUseScript.hpp

@@ -0,0 +1,26 @@
+#ifndef ITEMUSESCRIPT_HPP
+#define ITEMUSESCRIPT_HPP
+
+namespace CreatureLib::Battling {
+    class Creature;
+
+    class ItemUseScript {
+    public:
+        virtual ~ItemUseScript() = default;
+
+        /// @brief Is the item an item we are able to use?
+        [[nodiscard]] virtual bool IsItemUsable() const { return false; }
+        /// @brief Do we need to use the item on a creature?
+        [[nodiscard]] virtual bool IsCreatureUseItem() const { return false; }
+        /// @brief Can the item be used on the given creature.
+        [[nodiscard]] virtual bool IsUseValidForCreature([[maybe_unused]] Creature* creature) const { return false; }
+
+        /// @brief Can the item be held?
+        [[nodiscard]] virtual bool IsHoldable() const { return false; }
+
+        virtual void OnUse() const {}
+        virtual void OnCreatureUse([[maybe_unused]] Creature* creature) const {}
+    };
+}
+
+#endif // ITEMUSESCRIPT_HPP