Add project backoffice views

src/backoffice/locale/de/LC_MESSAGES/django.po

src/backoffice/locale/en/LC_MESSAGES/django.po

src/backoffice/templates/backoffice/project-new.html

...templates/backoffice/project/components/list_content.html

...ce/templates/backoffice/project/components/list_script.js

src/backoffice/templates/backoffice/project/create_edit.html

src/backoffice/templates/backoffice/project/list.html

src/backoffice/templates/backoffice/project_create_edit.html

src/backoffice/urls.py

src/backoffice/views/assemblies.py

src/backoffice/views/mixins.py

src/backoffice/views/projects.py

src/hub/settings/dev.py