Implement authentication so only auth-ed user can see, create todo and tasks

COMPLETION CONDITIONS:

1. Create auth page
2. Create auth panel (login/register form sits here)
3. Create auth related types
4. Create auth repos
5. Create auth services
6. Create auth store
7. Login/Logout display on header
8. Forbid showing todos when not logged in
9. Redirect to / after logging in
10. Redirect to /auth after logging out