Include formatting options in set_with_dataframe

[robin900]

This package is popular, but the gspread-formatting package is less so. I know from personal experience that writing tabular data to a gspread worksheet is pleasant only when proper formatting is applied to the worksheet -- mainly for bolding and shading header rows, and applying column alignment appropriate to the data type of the values for each column. Freezing the header rows is nice to have, especially when the data is more than 50 rows.

I wonder if this enhancement is accomplished best by just importing gspread_formatting as a new dependency, or whether to include bare-bones formatting functionality in this package without a new dependency on gspread_formatting.