Add exporter for uncompressed format

[PaulStahr]

Currently only export to exr and png is possible, both taking much time for encoding. Adding an uncompressed format like tif could make the computation much faster, at the cost of some disk space.

[PaulStahr]

Maybe Cimg https://cimg.eu/index.html is an interesting alternative for exports to different formats, as it seems to make a migration to windows much easier and covers all common formats.