Adds missing documentation about font fallbacks on `appearance.md` and
`all-settings.md`
`all-settings.md` only lacked terminal font fallback documentation so
that's the only thing I added there.
Self-Review Checklist:
- [X] I've reviewed my own diff for quality, security, and reliability
- [it's a doc update] Unsafe blocks (if any) have justifying comments
- [there is no ui] The content is consistent with the [UI/UX
checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)
- [it's a doc update] Tests cover the new/changed behavior
- [i really hope that my extra bytes on documentation cause no
performance impacts] Performance impact has been considered and is
acceptable
Release Notes:
- N/A
Self-Review Checklist:
- [ ] I've reviewed my own diff for quality, security, and reliability
- [ ] Unsafe blocks (if any) have justifying comments
- [ ] The content is consistent with the [UI/UX
checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)
- [ ] Tests cover the new/changed behavior
- [ ] Performance impact has been considered and is acceptable
Change the actions in docs to adopt the right format.
Release Notes:
- N/A
Mentioned in #47258
Release Notes:
- Added hotkey options and actions for toggling light and dark theme.
- Add default keymap as `cmd/ctrl+k cmd/ctrl+shift+t`
asdfer