Implement TaskController and swag for a new Python web api

Challenge: Convert one C# controller into python
https://github.com/classtranscribe/WebAPI/blob/staging/ClassTranscribeServer/Controllers/TaskController.cs
The current C# api is at /api
The python api could be at /pyapi and the swag api at pyswag for example.

See "RunEverything.md" in pyapi
Review pyapi code
Move existing python api to 'unused/' folder
Update requirements.txt
Learn SQLAlchemy2. Decide on how to represent database tables. In C# we define the tables as OO -

https://github.com/classtranscribe/WebAPI/blob/0884d002d9596bce1ab5115bbfb11a6a427096bf/ClassTranscribeDatabase/Models/Models.cs#L299

Decide how to make python unit + system tests? Examples in C#,
https://github.com/classtranscribe/WebAPI/tree/0884d002d9596bce1ab5115bbfb11a6a427096bf/UnitTests/ClassTranscribeServer/ControllerTests