Create Swagger UI for Thing based on defined properties, actions and events

[VigneshVSV]

The HTTP server should serve a swagger UI for the defined endpoints specified in the Thing code.

Involved subtasks

• Check if this can be generated from the Thing Description, the Thing Playground website offers some options for generating API specifications based on the Thing Description itself. Check how this can be integrated natively within our HTTP server or anywhere within the code
• Also check FastAPI and considering adding a FastAPI HTTP server alongside tornado

If that is not possible, do the following:

• define organisation - I would prefer if the segregation is according to "properties", "actions" and "events"
• write code for autogeneration
• define endpoint and handler