text: Title: [FEATURE] Automatically load fixups for FastAPI
  Body: **Is your feature request related to a problem? Please describe.**
  Sometimes users are not aware of some incompatibilities with FastAPI so some fixups are required.
  
  **Describe the solution you'd like**
  Detect FastAPI based on the `app` type inside loaders like `specs.openapi.loaders.from_dict` and automatically load the proper fixup. This should decrease the friction for FastAPI users
  
  The implementation could check all the classes inside MRO by their name (as we know what class is used by Fast API app)