Add vailable-auth

[tomfa]

Fix shared package. Then add new package vailable-auth with help methods for creating tokens, with autocomplete for permissions.

import auth from 'vailable-auth';

const userToken = auth.createToken({ 
  secretKey: string, 
  accountId: string, 
  userId: string,
  permissions: Permission[] = ['vailable:role:user'], 
});
const adminToken = auth.createAdminToken({ secretKey: string, accountId: string });