document the arguments in favor of 'set_columns' inplace method

[asmirnov69]

set_columns method is defined as aux way to set dataframe columns using list and avoid creation of method call glyph on pyjviz diagram. Such definition has problem with pyjanitor stated rule inplace methods should be avoided (need ref here).

The document needs to be created to address this contradiction. It also make sense to crossref with pyjanitor-devs/pyjanitor#76

@method_call.pass_through_method
@pf.register_dataframe_method
def set_columns(df: pd.DataFrame, columns) -> pd.DataFrame:
        df.columns = columns
        return df