Implement vector and node conversion in Lua (#12609)

Co-authored-by: sfan5 <sfan5@live.de>

src/script/scripting_client.cpp

@@ -78,6 +78,7 @@ void ClientScripting::InitializeModApi(lua_State *L, int top)
 
 	ModApiUtil::InitializeClient(L, top);
 	ModApiClient::Initialize(L, top);
+	ModApiItemMod::InitializeClient(L, top);
 	ModApiStorage::Initialize(L, top);
 	ModApiEnvMod::InitializeClient(L, top);
 	ModApiChannels::Initialize(L, top);