Add inventory.

test/rpg/test_rpg.c

@@ -0,0 +1,16 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "dusktest.h"
+
+int main(int argc, char** argv) {
+  const struct CMUnitTest tests[] = {
+    // Add RPG tests here in the future
+  };
+
+  return cmocka_run_group_tests(tests, NULL, NULL);
+}