How should the "slices" be used? #26
Description
The README in the slices folder explains what the "slices" are and why they're necessary: CJK scripts are too big for single font files, so they need to be split up.
It's not clear, however, how they should be used. Is it safe to use a set of fonts that include just the characters defined in the slice files? There's no Python or Rust API for getting the subset slices.
The slice files also don't line up with the corresponding .nam files. For instance, chinese-hongkong_unique-glyphs.nam includes U+301A LEFT WHITE SQUARE BRACKET, but slices/hongkong-chinese_default.txt does not. Should these extra characters be put in their own unique slice, or omitted entirely?