FastAPI-with-Celery

Data directory include both routes and database models for simplicity. Created service directory for database queries, for now only has user service for user db queries. Upon launch, global_init is executed to connect to the database and create models if any new db models are made, also ready to get session to make queries. Added requirements for aiosqlite for async capabilities.

Initial commit. Using celery for queueing a task. Right now emulating the 'processing' part with a time delay. Using flower as a dashboard for tracking celery tasks. Redis is used as the message broker and backend.