Support for CFF/CFF2 outlines in `write-fonts`

I don't know if I missed something, but `write-fonts` does not seem to export anything related to CFF/CFF2 outlines. Is this part of `write-fonts` unfinished with more work needing to be done, or was this part simply forgotten to be exported? I mean, `write-fonts/generated/generated_cff.rs` and `write-fonts/generated/generated_cff2.rs` exist, but aren't actually `include!`'d the way they are in `read-fonts`. Also, `write-fonts/tables/cff.rs` and `write-fonts/tables/cff2.rs` don't exist.