Describe the bug

In hubspot-api-client version 12.0.0, the files_api.upload() method fails when passing a file from memory, such as a BytesIO object, bytes, or a Django InMemoryUploadedFile. The SDK attempts to call open() on the object, leading to errors like:

TypeError: expected str, bytes or os.PathLike object, not _io.BytesIO
UnicodeDecodeError: 'utf-8' codec can't decode byte ...
TypeError: a bytes-like object is required, not 'dict'

To Reproduce

from io import BytesIO
import json
file_bytes = b"test content"
response = client.files.files_api.upload(
    file=BytesIO(file_bytes),
    file_name="test.txt",
    folder_path="test",
    options=json.dumps{"access": "PUBLIC_NOT_INDEXABLE"}
)

Expected behavior

The SDK should accept file-like objects or raw bytes and upload them to HubSpot.
Users should not be forced to write temporary files to disk.

Actual behavior

The SDK treats the object as a filename string, attempts open(), and raises a TypeError or UnicodeDecodeError.

Suggested fix

Update files_api.upload() to properly detect file-like objects (bytes, BytesIO, Django UploadedFile) and avoid always calling open().
Ensure options can be passed as a dict and converted to JSON internally, rather than requiring json.dumps