Please add support for different encodings in CSV writer (Class ZCL_EXCEL_WRITER_CSV)

[Developer-101-c]

I have a request concerning Class ZCL_EXCEL_WRITER_CSV, Method CREATE_CSV.
In the end, this method calls Function Module SCMS_STRING_TO_XSTRING.
This function module has an optional parameter ENCODING.

Please add a new class attribute and a setter method for the ENCODING analogous to DELIMITER, ENCLOSURE and ENDOFLINE
and supply it to the function module SCMS_STRING_TO_XSTRING in method CREATE_CSV.

Thank you very much.

[gregorwolf]

Pull requests are always welcome.