Fixes https://gitlab.com/nonguix/nonguix/-/issues/224 * *.scm: Use SPDX license identifier and remove obsolete license statement.
This increases the size of the ISO by 100MiB. * nongnu/system/install.scm (operating-system)[packages]: Add curl, git, neovim and zile.
* nongnu/system/install.scm: New file.