Export to .carve/ignore

[AndreaCrotti]

It can be useful when introducing carve (maybe after a first initial pass) to create a .carve/ignore file with all the things that should indeed be ignored automatically.
Atm I've just done transforming the :text report into the .carve/ignore report which was just a couple of lines in clojure, but maybe we could just add another report format so something like this would work:

carve --opts '{:paths [...] :report {:format :ignore}}' > .carve/ignore

I can do a PR if you like the idea @borkdude ?