When creating files as part of the cut command, use a proxy that
logs information about the hash, path, mode, etc. This will then be
ingrated into a report which will be part of chisel.db.

The libc6 contents' paths have changed in 24.04.

This PR adjusts the spread tests such that they accommodate that change.

The report will be the main data source for chisel.db. This PR introduces
the skeleton and the reporting functionality in the package extractor.

To make the content transparent and facilitate changing the package,
this commit creates the deb used for testing programmatically instead of
embedding it as a base64-encoded blob directly.

This commit adds support for package names with a minimum length of two.
Previously chisel only supported a minimum length of 3. The limit on the
slice name is kept unchanged.