converts PDFs to dark mode
- features::
- embeds dark or dimmed mode in PDF for export
- applies balanced-contrast dark mode transform (i.e., not a pure inversion) so it's easier on the eyes
- customize text to any color by specifying hex/rgb/hsl values
- add a secondary gradient tone (experimental)
- retain image colors in dark moded PDF (experimental)
- OCR scanned documents to add a text layer to the PDF