chore: add ref docs comment

refactor(auth)!: moved all auth handling out of libmangal

BREAKING CHANGE: remove all (for now only oauth was handled) auth
handling from libmangal, this should be handled by "front end" clients
such as `mangal`; all libmangal cares about is the access token, which
is also no longer cached (or the user data)

as mentioned in previous commits, this was bound to happen and i feel
like this is the best way to use login from libmangal; need to decide if
the User data should be cached, depending on how much the User data is
being retrieved this might be needed

fix(anilist): wrong username when deleting auth cache

feat(anilist)!: add auth user anilist, heavily refactor auth

BREAKING CHANGE: an username is needed to start an authenticated
anilist and all authentication related methods are heavily modified

- add anilist user data (for authenticated user)
- change the way the auth data is saved, the username is now used
  as the key for storing the access token user data
- change method for code grant and add implicit grant (access token), both
  validated by getting the authenticated user data
- logout method now takes a parameter to let anilist now to delete the
  cached data or not
- add method to delete username auth data

refactor(anilist): move out the request code to util

chore: remove forced prefix from logger

refactor!: remove anilist from client options

make checks for valid anilist client and refactor read chapter method

refactor!: simplify metadata.ID fields naming

minor breaking change on the ID fields names

refactor(metadata)!: made the metadata a generalized interface

BREAKING CHANGES: the metadata is now an interface and its behavior
is heavily different; an generic implementation for providers is
available as well as the anilist manga (which is metadata);
this change will make it easier to develop metadata consumers (such as a
UI to see the metadata) and just have to worry about one implementation
for each usage of the metadata

docs: minor changes