Add templates.

biscuit/core/settings.py

biscuit/core/templates/two_factor/_base_focus.html

biscuit/core/templates/two_factor/_wizard_actions.html

biscuit/core/templates/two_factor/_wizard_forms.html

biscuit/core/templates/two_factor/core/backup_tokens.html

biscuit/core/templates/two_factor/core/login.html

biscuit/core/templates/two_factor/core/otp_required.html

biscuit/core/templates/two_factor/core/phone_register.html

biscuit/core/templates/two_factor/core/setup.html

biscuit/core/templates/two_factor/core/setup_complete.html

biscuit/core/templates/two_factor/profile/profile.html