[Items] Overhaul Item Hand-in System (#4593)

* [Items] Overhaul Item Hand-in System

* Edge case lua fix

* Merge fix

* I'm going to be amazed if this works first try

* Update linux-build.sh

* Update linux-build.sh

* Update linux-build.sh

* Update linux-build.sh

* Update linux-build.sh

* Update linux-build.sh

* Update linux-build.sh

* Update linux-build.sh

* Add protections against scripts that hand back items themselves

* Remove EVENT_ITEM_ScriptStopReturn

* test

* Update npc_handins.cpp

* Add Items:AlwaysReturnHandins

* Update spdat.cpp

* Bypass update prompt on CI

zone/lua_npc.h

@@ -9,6 +9,7 @@ class Lua_Mob;
 class Lua_NPC;
 class Lua_Client;
 struct Lua_NPC_Loot_List;
+class Lua_Inventory;
 
 namespace luabind {
 	struct scope;
@@ -186,6 +187,15 @@ public:
 	void SetNPCAggro(bool in_npc_aggro);
 	uint32 GetNPCSpellsEffectsID();
 	void DescribeSpecialAbilities(Lua_Client c);
+	bool IsMultiQuestEnabled();
+	void MultiQuestEnable();
+	bool LuaCheckHandin(
+		Lua_Client c,
+		luabind::adl::object handin_table,
+		luabind::adl::object required_table,
+		luabind::adl::object items_table
+	);
+	void ReturnHandinItems(Lua_Client c);
 };
 
 #endif