add image codecs test

Author: d-v-b

examples/image_codecs.py

@@ -0,0 +1,29 @@
+# /// script
+# requires-python = ">=3.11"
+# dependencies = [
+#   "zarr @ file:///home/bennettd/dev/zarr-python/",
+#   "imagecodecs==2025.3.30"
+# ]
+# ///
+
+#   "zarr @ git+https://github.com/zarr-developers/zarr-python.git@main",
+
+import numcodecs
+import numpy as np
+from imagecodecs.numcodecs import Jpeg
+
+import zarr
+
+numcodecs.register_codec(Jpeg)
+jpg_codec = Jpeg()
+store = {}
+
+z_w = zarr.create_array(
+    store=store, data=np.zeros((100, 100, 3), dtype=np.uint8), serializer=jpg_codec, zarr_format=3
+)
+
+# breakpoint()
+
+z_r = zarr.open_array(store=store, zarr_format=3)
+
+print(z_r.metadata.to_dict()["codecs"])