LindiH5pyFile - implement close() properly

[magland]

__init__ states that users should use the from_* factory methods instead. Who is responsible for closing objects that are being opened there? E.g., in from_zarr_store the factory methods opens the zarr store, but other than the returned LindiH5pyFile object, no-one else has access/owns the file.

lindi/lindi/LindiH5pyFile/LindiH5pyFile.py

Lines 52 to 59 in fe51dbc

	@staticmethod
	def from_zarr_store(zarr_store: Union[ZarrStore, FSMap]):
	"""
	Create a LindiH5pyFile from a zarr store.
	"""
	zarr_group = zarr.open(store=zarr_store, mode="r")
	assert isinstance(zarr_group, zarr.Group)
	return LindiH5pyFile.from_zarr_group(zarr_group)

For factory methods that require an already opened file to be handed in, I agree, that LINIDI should not just close it. But for cases where LINDI functions open the file (and in particular when the opened file/store is not being exposed to the caller), I think it should be the role of LINDI to close.

Originally posted by @oruebel in #21 (comment)