Simplify File Usage

[MarkDaoust]

Description of the bug:

There are a bunch of examples for the new SDK rthat look like this:

response = client.models.generate_content(
    model=MODEL_ID,
    contents=[
        types.Content(
            role="user",
            parts=[
                types.Part.from_uri(
                    file_uri=file_upload.uri,
                    mime_type=file_upload.mime_type),
                ]),
        "Write a short and engaging blog post based on this picture.",
    ]
)

They can be simplified to:

response = client.models.generate_content(
    model=MODEL_ID,
    contents=[
        file_upload,
        "Write a short and engaging blog post based on this picture.",
    ]
)

Actual vs expected behavior:

No response

Any other information you'd like to share?

No response