Fix chunk formatting warning and fix consolidated metadata not implemented warning

[ctuguinay]

Problem 1:

Dask needs dictionary chunk encoding and Zarr requires list-like chunk encoding.

I fix this by separating Dask and Zarr encodings and rechunking Dask with it's dictionary encoding and removing that encoding once the encoding dictionary is passed into to_zarr.

Problem 2:

Xarray describes to_zarr's consolidated parameter behavior as:

If True, apply zarr’s consolidate_metadata function to the store after writing metadata and read existing stores with consolidated metadata; if False, do not. The default (consolidated=None) means write consolidated metadata and attempt to read consolidated metadata for existing stores (falling back to non-consolidated).

But Zarr v3 doesn't support consolidated metadata just yet, so we will always get this falling back to non-consolidated warning whenever we call .to_zarr on an Echodata object serialized using Zarr v3. Fixing this will handle one of the problems listed here: echostack-org/echopype-examples#119.

I fix this by explicitly calling consolidated=False.

[ctuguinay]

Weird...not quite sure why it auto-closed itself

[ctuguinay]

This should be ready for review