Refactor array to avoid having to include external types

codegen/array/snippets/array_pop

@@ -1,5 +1,4 @@
-  if (!array || array->count == 0) {{
-    return ({T}){{0}};
-  }}
-
-  return array->items[--(array->count)];
+  u64 index = array->count - 1;
+  {T} *out = wapp_{Tlower}_array_get(array, index);
+  --(array->count);
+  return out;