Fixes#250, replacing cookies with auth-bearer tokens. This is done using fernet with randomised keys each startup. The reason for this is that in the future the size of the auth token may exceed cookie limits, so we must be able to understand and process auth bearer. Additionaly, this lets us store the tokens for say the kanidm cli as reqwest today can't persist a cookie jar.
Fixes#195 pre release cleanup. This does a LOT, clippy, formatting, and much much more. It fixes a lot of parts of the book, improves server config and more.
