Added pet adoption API

backend/adoption/__init__.py

backend/adoption/__pycache__/__init__.cpython-312.pyc

backend/adoption/__pycache__/admin.cpython-312.pyc

backend/adoption/__pycache__/apps.cpython-312.pyc

backend/adoption/__pycache__/models.cpython-312.pyc

backend/adoption/__pycache__/serializers.cpython-312.pyc

backend/adoption/__pycache__/urls.cpython-312.pyc

backend/adoption/__pycache__/views.cpython-312.pyc

backend/adoption/admin.py

backend/adoption/apps.py

backend/adoption/migrations/0001_initial.py

backend/adoption/migrations/__init__.py

...ption/migrations/__pycache__/0001_initial.cpython-312.pyc

.../adoption/migrations/__pycache__/__init__.cpython-312.pyc

backend/adoption/models.py

backend/adoption/serializers.py

backend/adoption/tests.py

backend/adoption/urls.py

backend/adoption/views.py

backend/db.sqlite3