* Add all missing libraries in the packages/apps.
* Add all missing Vitest imports to the tests.
* Add some missing exports to ui.
* Fix the admonition export.
* Fix various minor bugs.
* Migrate the ui package to use vitest.
The end of the Great Migration is here!!!
Moves the last pages over, deleting pages like the FAQ that we don't use
and that contain duplicated information anyway.
Dev secret auth page URL had to change as App Router doesn't like the
leading underscores in the path.
Also fixes the not-found recommendations to use the proper Next.js
not-found page so it will return a 404 as it should. (I was under the
erroneous impression that I couldn't get the pathname in not-found.tsx,
that is not true, so this works better.)
Ivan Vasilov