Override automatic type detection of line ending and indentation

[Roald87]

Currently if TcBlack will detects a single \r\n in a .TcPOU file it will use \r\n as a line ending. Similarly for the indentation: if it finds a single \t in a file it will use that one for the entire file.

It would be nice to override this behavior. For example in case there is a single \t in the file, but everywhere else four spaces are used.

Also this would allow for more indentation types then the current options of tabs or four spaces. Finally this would allow for an easy way to standardize the indentation across an entire project.