New changes: importer: Added a simple test for lockfile importer.
importer: Added short option for ‘--lockfile’: ‘-f’, with a space, shell will pass expanded file name to importer. importer: Error out when lockfile doesn't exist. build system: Preserved compatiblity with existing packages: Cargo workspace support will only be enabled when #:cargo-package-crates (for package phase) or #:cargo-install-paths (for install phase) is set. build system: find command used in check-for-pregenerated-files rewritten in Guile (but kept grep), file tree will be scanned only once, not sure if this can save some time. For compatiblity with existing packages, check-for-pregenerated-files won't fail now (as it's moved after configure). Many tests and assets are also removed from rust-crates.scm sources. The next is documentation :)
