Add DZI support

[AhmetNSimsek]

dzi is another tiled image format that is rather widely used in Neuroscience community. Since we cannot control the source, unlike Neuroglancer, we cannot rely on the transformation data to be present along with the image. During the dev meeting on 17.01.2024, it is decided that if there is no affine in the source, siibra will use from the configuration.

[AhmetNSimsek]

Example dataset: https://search.kg.ebrains.eu/?facet_type[0]=Dataset&category=Dataset&q=timm#0bf058d2-6bf7-4e0f-8067-345e07109bf8
(see FZJ-INM1-BDA/siibra-explorer#1418)