Add manifest crate

[o2sh]

As a follow up to #845, this PR adds a new library to onefetch manifest that detects and parses package manifests, only Cargo.toml and package.json are supported for now.

As a result:

• New info line -> Description
• Fallback to manifest entries for:version number, repo's name and license -> if not found with gitoxide or askalono, we display the data extracted from the manifest (if present)
• Remove DependencyDetector now part of manifest lib.

Left to do:

• Add tests
• Handle long description

[Byron]

I think I have been auto-selected for review by GitHub, but thought I'd leave some comments about parts that I think can be more idiomatic, which usually means 'objectively preferable', but maybe not always 😅. That said, I hope it's useful, otherwise, please ignore.