Fixes #8

Run MinGW build through Wine:

export NIXPKGS_ALLOW_BROKEN=1
export NIXPKGS_ALLOW_UNSUPPORTED_SYSTEM=1
nix run .#openemshWine64 --impure -L -- -G -i test/ελληνικά狗.csx

The Unicode filename should be handled correctly, either by achieving processing the file, in the window title or in the Open, Save as... dialogs.

Also, a CI workflow triggered by a release publish will build a zip package and upload it as release asset. Here is a run that uploaded the package as workflow artifact due to the manual trigger, and thus no release to populate. I didn't try but it should work on a real Windows machine.