Automatic Field Separator Detection

[osiegmar]

While FastCSV automatically detects different line delimiters (CR, LF and CRLF) and also provides a way to automatically detect BOM headers, it's currently unable to automatically detect the character used as a field separator.
It's a common problem that CSV files are not always saved with the same field separator. For example, some files use a comma (which would be the only valid separator according to the RFC), while others use a semicolon or something else. This can lead to parsing errors or incorrect data being read.

The idea is to implement a feature that automatically detects the field separator based on the content of the CSV file. This could be done by analyzing the first few lines of the file and counting the occurrences of different potential field separators. The one with the highest count would be chosen as the field separator.