feat: Support output of checksum in long listing

Using `eza --long` to also output CRC32 checksums.

**Downsides:**

- Calculcation of checksums takes more time than just listing files. Maybe it's good to use a separate tool for file listings with checksums.

Start by tracing the `--long` option through eza's listing and metadata code, then inspect how existing columns are formatted and tested. Define the expected CRC32 checksum representation and placement before implementing it; done means `eza --long` displays checksums reliably, with tests covering the new output and its added cost considered.

Written by the indexing model from the issue text.