OpenAPI spec document improvements

[devster31]

Current OpenAPI documentation seems to be generated by deno task openapi:generate and this produces a huge document.
The output document is over 70.000 lines long and contains no schemas for response objects or parameters which are all inline.

I believe providing schemas would be massively beneficial both for the usage of the API and the developers who may wish to integrate their app with Trakt as it would provide a clear source of truth for structures returned by the API and a clear documentation on required and optional parameters as well as validation for these parameters.

Aligned with this issue is the fact that the current OpenAPI document isn't aligned with the documentation provided in the official Trakt API Blueprint which still seems to be the official reference.