* checkpoint
* make emitters async generators
* fix
* custom font spec
* replace spinner, use disk cache for fonts
* use readline instead
* make og images look nice
* start work on client side explorer
* fix tests
* fmt
* generic test flag
* add prenav hook
* add highlight class
* make flex more consistent, remove transition
* open folders that are prefixes of current path
* make mobile look nice
* more style fixes
A final breadcrumb has an empty href, linking to the current page, but
the relative url normalization method missed those, making the link
appear broken in search previews and popovers.
Fixes#1690
* use slugs instead of title as basis for explorer
* fix folder persist state, better default behaviour
* use relative path instead of full path as full path is affected by -d
* dont use title in breadcrumb if it's just index lol
