Remove example prefix from example cell clustering files (#9)

- Remove prefixes from cell data (e97a768cf2a2ddf680d0aaab07c5e5cf370fdc3e)
- Change file path names and data to match updated workflow (e6af1b76320256c1727b0ccfaf1a684aa780725e)
- Revert "Change file path names and data to match updated workflow" (09a97e270dd87e39d9bd8ee9aa29f40004471811)
- Change file path names and data for pixel clustering (c3f455df3dc1ccb9a570919ef01c9f591a8e4d26)
- Change file path names and data for cell clustering (449889e96ba063e499e802b9e744d56314d6c046)
- Propagate segmentation_dir key change in cell_clustering_params in (1cab29d817d03b924edd32e6b3e2e13e61160c57)
- Merge branch 'main' of https://huggingface.co/datasets/angelolab/ark_example into pr/9 (5df078287eb84f3a3d27c05c714e752773f49c50)
- Ensure all average files subsetted with avg and not avgs (e6f8075f810208caee59c1f58b327105e46b6b78)
- Change weighted_cell_channel.csv to weighted_cell_channel.feather (51c62c6260f81e69c0e57a67c5bc80000a457c72)

data/pixie/example_cell_output_dir.zip

@@ -1,3 +1,3 @@
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-oid sha256:4db7ebdd0aa88371ce348a4a5c5f851077cb3bffa1289c014173a0f1492c0006
-size 86425942
+oid sha256:81c653f8ba3b183de6e4dd48fba42745633eaa8b27e805116db189a87cf384af
+size 85406474

data/pixie/example_pixel_output_dir.zip

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:2ed69075fc004fc36b8039f3033e0810d9108761c4e34f90c218f7fe324abb21
-size 1494869921
+oid sha256:13fc1609f2c91456acbaf10c9851e28c7781825b0a363cd0e98a8e44d04d2972
+size 1494869304