fix: python binding kwargs parsing

[trim21]

Which issue does this PR close?

Closes #.

Rationale for this change

kwargs parsing is not correct with default pyo3 derive, it will try to parse from attribute instead of dict.__getitem__

Traceback (most recent call last):
  File "C:\Users\Trim21\proj\test\f.py", line 15, in <module>
    print(s3.write("test", b"tc", content_type="text/html"))
AttributeError: 'dict' object has no attribute 'append'

What changes are included in this PR?

Use dict_derive to parse struct from kwargs dict. Didn't find this in pyo3.

another option is to remove #[pyclass] from WriteOptions and remove m.add_class::<WriteOptions>()? which may cause a breaking change and pyo3 doesn't support optional with #[pyo3(item)]

Are there any user-facing changes?

Yes, op.write() not support kwargs.

[messense]

LGTM