- moved ultragrid-bugreport-collect.sh to doc (will be bundled automatically)
- moved data/MacOS-bundle-template to data/template (just a move)
- added data/template/README.md
The size is only some 90 kB when compressed so it is perhaps not worth
downloading from external source and depend on it.
It could be even bundled directly, not by CI. Now it is actually the case
in Linux (create-appimage.sh) but it is also possible for other platforms.
