Improve csv file handling (separator and file encoding)

[dragoudin]

What feature do you want to see added?

Currently, for csv file, field separator is set to ",".
Depending on data, this field can be different.
It would be good to have an option for csv files (sep, delimiter???) which could be set to '\t', ",", ";", ":"... or any user character.

For file encoding, my data use UTF-8. I don't know if the tool autodetect encoding or if data with other encoding might cause problems.

Upstream changes

No response