Save files function

Ticket: https://www.notion.so/qim-dtu/Save-functions-for-H5-Nifti-and-TXM-VOL-a45239dbda58492bbccd719b9d9398d4?pvs=4

Limitations: Does not save meta data

requested review from @fima

assigned to @s204159

added 5 commits

• 638c6809...1c8ccdf8 - 4 commits from branch main
• 206f0eec - Merge branch 'main' into 'save_files_function'

Compare with previous version

approved this merge request

mentioned in commit 40da2311

merged