disallow regular chunk grid with 0-length chunks

[d-v-b]

We support creating arrays with 0-sized chunks, but we error when accessing the values via __getitem__. Because the spec defines chunk sizes as non-zero integers, we should error at array creation time here.

>>> zarr.zeros(store={}, shape=(1,5,1), chunks=(1,2,0)).chunks
(1, 2, 0)
>>> zarr.zeros(store={}, shape=(1,5,1), chunks=(1,2,0))[:]    
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/d-v-b/dev/data-model-1/.venv/lib/python3.12/site-packages/zarr/core/array.py", line 2868, in __getitem__
    return self.get_orthogonal_selection(pure_selection, fields=fields)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/d-v-b/dev/data-model-1/.venv/lib/python3.12/site-packages/zarr/core/array.py", line 3338, in get_orthogonal_selection
    indexer = OrthogonalIndexer(selection, self.shape, self.metadata.chunk_grid)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/d-v-b/dev/data-model-1/.venv/lib/python3.12/site-packages/zarr/core/indexing.py", line 923, in __init__
    dim_indexer = SliceDimIndexer(dim_sel, dim_len, dim_chunk_len)
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/d-v-b/dev/data-model-1/.venv/lib/python3.12/site-packages/zarr/core/indexing.py", line 424, in __init__
    object.__setattr__(self, "nchunks", ceildiv(dim_len, dim_chunk_len))
                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/d-v-b/dev/data-model-1/.venv/lib/python3.12/site-packages/zarr/core/common.py", line 94, in ceildiv
    return math.ceil(a / b)
                     ~~^~~
ZeroDivisionError: division by zero

This will be a breaking change for anyone relied on the creation of these arrays.

[d-v-b]

xref: zarrs/zarrs#352