[feature request] support tiff

[bung87]

my use case: DavideGalilei/nimtesseract#1 (comment)

[treeform]

Thank you for the issue. We started looking at the tiff format and can load the most basic tiff, still more work is needed though. It might be a wile before we are done.

[treeform]

We supported some TIFF stuff, but this PR expands TIF support to even a wider margin: #576