Re-add py.typed

Author: crusaderky

array_api_compat/py.typed

@@ -33,5 +33,8 @@
         "Programming Language :: Python :: 3.13",
         "License :: OSI Approved :: MIT License",
         "Operating System :: OS Independent",
-    ]
+    ],
+    package_data={
+        "array_api_compat": ["py.typed"],
+    },
 )