Implement authentication with Azure AD

[TorrentofShame]

• Implements Azure AD to protect the api
• Adds localhost:port websites to cors origins depending on an env variable (which will be set on staging)

Checklist:

• [x] Add tests that demonstrate the correct behavior of the change. Tests should fail without the change.
• [x] Add or update the relevant docs.
• [x] Add an entry in CHANGELOG.md summarizing the change.
• [x] Run tests, with no tests failed.

[github-actions[bot]]

File	Coverage
All files	71%	:x:
src/__init__.py	86%	:white_check_mark:
src/api/__init__.py	85%	:white_check_mark:
src/api/auth.py	75%	:white_check_mark:
src/api/club_events.py	67%	:x:
src/api/email_verification.py	39%	:x:
src/api/hackers.py	56%	:x:
src/api/sponsors.py	37%	:x:
src/common/decorators.py	55%	:x:
src/common/json.py	77%	:white_check_mark:
src/common/jwt.py	52%	:x:
src/common/mail.py	45%	:x:
src/common/utils.py	42%	:x:
src/models/__init__.py	84%	:white_check_mark:
src/models/hacker.py	95%	:white_check_mark:
src/models/sponsor.py	84%	:white_check_mark:
src/tasks/__init__.py	78%	:white_check_mark:
src/tasks/clubevent_tasks.py	19%	:x:
src/tasks/mail_tasks.py	45%	:x:

Minimum allowed coverage is 75%

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