allow send_data_frame to send df.to_csv using send_bytes

pandas df.to_csv supports encodings other than utf-8 in versions > 1.2 but only if the path_or_buf is a binary file type so if I want to do dcc.send_data_frame(df.to_csv, "mydf.csv", encoding='utf-8-sig'), the encoding will still be utf-8 unless I modify this line with this monkey patch so the file is sent as bytes:

dcc.express._data_frame_senders['to_csv'] = dcc.express.send_bytes

It would be great if there was an option so that send_data_frame used bytes if pandas > 1.2 and encoding was one of the kwargs.

Simple example to test:

import pandas as pd

# uncomment this line so that the specified encoding works
# dcc.express._data_frame_senders['to_csv'] = dcc.express.send_bytes

app = Dash(__name__)
app.layout = html.Div(
    [
        html.Button("Download CSV", id="btn_csv"),
        dcc.Download(id="download-dataframe-csv"),
    ]
)

df = pd.DataFrame({"a": ['á', 'é', 'å', 'ñ'], "b": [2, 1, 5, 6], "c": ["x", "x", "y", "y"]})

@app.callback(
    Output("download-dataframe-csv", "data"),
    Input("btn_csv", "n_clicks"),
    prevent_initial_call=True,
)
def func(n_clicks):
    df.to_csv("code.csv") # the output file is 43 bytes using utf-8
    return dcc.send_data_frame(df.to_csv, "mydf.csv", encoding='utf-8-sig') # the output file is 46 bytes using utf-8-sig
   
if __name__ == "__main__":
    app.run_server(debug=True)

Start at components/dash-core-components/dash_core_components_base/express.py around the linked line and inspect how send_data_frame selects the sender for to_csv. Reproduce the example with pandas and encoding='utf-8-sig', then verify that the downloaded CSV preserves the requested encoding while existing send_data_frame behavior remains unchanged.