Created folder structure

bbcli/Entities/RequestData.py

bbcli/Entities/__init__.py

bbcli/Services/AnnouncementService.py

bbcli/Services/AuthorizationService.py

bbcli/Services/ContentService.py

bbcli/Services/CourseAnnouncementService.py

bbcli/Services/CourseService.py

bbcli/Services/__init__.py

bbcli/cli.py

bbcli/endpoints.py

venv/pyvenv.cfg