feat: Types for the FastAPI API and API refactor

[filiptrplan]

Description:

Added Pydantic types to the FastAPI responses. This is preparation so we can generate a strongly-typed frontend client.

We also have a lot of endpoints that return JSON like this

{
  "success": true,
  "message": "..."
}

And returns false when the action fails, the status code remains 200. We will migrate to a new response type where we don't include the success variable and handle errors by returning the appropriate HTTP status codes.

Checklist

• items.py
• Type scrape.py
• Type settings.py
• Type tmdb.py
• Type default.py
• Test all the changed API endpoints
  • Ensure compatibility with the frontend

[dreulavelle]

We should add the settings models to this too. We should be handling validations with pydantic for those too.. before now we havent used the full potential of pydantic.

Apreciate the hard work man!

[filiptrplan]

We should add the settings models to this too. We should be handling validations with pydantic for those too.. before now we havent used the full potential of pydantic.

Apreciate the hard work man!

Added to the goals :)