feature request: an option to search

[heygarrett]

I'd love to be able to do something like xdg-ninja ghc to see where ghc puts config files by default and what options there are to move them to XDG directories. Currently I'd need to use the tool to see where the default files end up, and then I can run xdg-ninja to see what the suggestions are (or I need to search the code in this repo).