Icechunk docs update

[abarciauskas-bgse]

@paraseba has already done a lot of great work updating docs. I am trying to help out with a few things I noticed still outstanding so opening this issue to track those docs issues I found.

• https://icechunk.io/icechunk-python/virtual/ - I don't think this example will run using the install commands in the issue Virtual Dataset Workflow Tracking Issue #197, specifically because if you install icechunk separately from VirtualiZarr, it will install VirtualiZarr 1.2.0 and icechunk 0.1.0a15, which are incompatible. I tried to use specific previous versions of icechunk with VirtualiZarr but am constantly running into issues. I could continue to try and resolve which Virtualizarr / previous icechunk version was stable, perhaps it was before 1.2.0. OR we could just remove the existing content from that page and say a future version of VirtualiZarr will be released that is stable with icechunk. Open to other suggestions! cc @mpiannucci
  a. Examples: Array codecs being out of order (I think a result of zarray._v3_codec_pipeline() in VirtualiZarr) or TypeError: AsyncGroup.create_array() got an unexpected keyword argument 'overwrite' (probably some zarr python incompatibility with the VirtualiZarr version) or, in icechunk 0.1.0a8 I found session.store returned TypeError: Can't instantiate abstract class IcechunkStore with abstract methods empty, with_mode (using a local filesystem store).

• https://icechunk.io/sample-datasets/ - should this page be removed or can the s3://earthmover-sample-data/icechunk/oisst.2020-2024/ store be updated? I believe it won't work with the latest icechunk version

• I haven't tried this one out yet but I think https://icechunk.io/icechunk-python/notebooks/demo-s3/ needs to be updated as its still using StorageConfig.