- add missing emacs bindings
- properly feature guard swiper related bindings
- for selectrum, unbind `SPC s B` and temporarily bind `SPC s s` to
isearch to prevent don't get errors until we decide what to do there.
- update readme to reflect that
- make all markers both prefixes and suffixes
- add `\`` affix for initialism
- add initialism matching to be on by default in `symbol` and `command`
- category completions