Consider include/exclude when checking if the package has changed

[Systemcluster]

Currently publish-crates checks if unpublished changes exist by querying GitHub for the last commit date. This is fine in many cases, but will result in false-positives when Cargo.toml contains an include or exclude field.

Instead of querying GitHub, it could make sense to iterate through the crate directory and call git directly, e.g. with git log -1 --pretty="format:%ct" /path/to/file, to get the change time while skipping over non-included files.

As far as I know cargo metadata doesn't contain include and exclude information, so this would require parsing Cargo.toml for those keys.