Raise exceptions in core

[ricardogsilva]

Python's error handling is usually done by raising exceptions and catching them in client code.

As such, let's follow this pattern in core. Whenever a function errors out, instead of returning normally with an error object, let's raise an exception and pass the responsibility of handling it up to the caller.

In practice, this means that while working with functions like

def get_workspace(self, workspace: str) -> Union[WorkspaceModel, GSResponse]:
        client = self.http_client
        response = client.get(f"workspaces/{workspace}")
        if response.status_code == 200:
            return WorkspaceModel.model_validate(response.json())
        else:
            return self.response_recognise(response.status_code)

Instead of returning the error with whatever object is generated by self.response_recognize() (which is nicely presented), we'd raise an exception.

check if we can give back error message that httpx gives