config: finalize and version format for v0.1
apkg relies on reading its
distro/config/apkg.toml config in order to work correctly so its compatibility must be ensured through time. This is especially important in
--upstream mode which uses
distro from archives - compatibility must be maintained in order for
apkg to build packages from older archives.
rethink and refactor
- implement config versioning to allow config changes without breaking older configs