Add setting to control the type of line endings used when files are modified

[grant-humphries]

I do development on a Windows machine, but set all the files in my projects to have Unix line endings. Whenever one of this project's CLI tools modifies a file it detects that the operating system is Windows and writes with CRLF's and I have to manually switch them to LFs to retain the setup I prefer.

It would be nice to have setting that controls what type of line endings are used regardless of the platform.