Zarr loading and converting

Created functions to load and save zarr files. Remember to use virtual_stack=True

In addition I created a new file in the IO folder to convert file types. Currently zarr to tif and tif to zarr is supported.

This is only the beginning of work with zarr files.

https://www.notion.so/qim-dtu/Zarr-Python-preliminary-study-047ed1d9056345efaec6094c757791f9?pvs=4 https://www.notion.so/qim-dtu/Zarr-load-and-save-function-c52a17fac1a84a20b70d5d51d1eb93ec?pvs=4 https://www.notion.so/qim-dtu/Create-tool-to-convert-file-types-abc23dbf98b6442bbcc700ed9bc581ac?pvs=4