Getting shaders working with lua.

src/duskrpg/item/backpack.c

@@ -0,0 +1,15 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "backpack.h"
+
+inventorystack_t BACKPACK_STORAGE[BACKPACK_STORAGE_SIZE_MAX];
+inventory_t BACKPACK;
+
+void backpackInit() {
+  inventoryInit(&BACKPACK, BACKPACK_STORAGE, BACKPACK_STORAGE_SIZE_MAX);
+}