Add command option to read current settings and output as preset file

Hi!

Thank you for this fantastic tool! I have been looking for something like this for a long time!

However, seeing that I often have to operate on other peoples (non vanilla) machines, or computers per-configured with some unknown bloat. I think it would be a great feature implementation to be able to actually read out, what is the current settings, so that it could be saved and diffed if necessary. I suggest:

• Add a command line option (e.g. -show) to read (and try to figure out) what the current preset settings are and output this info in the same format as the default preset file.