feat: add support for macOS color tags on macOS and other systems

[olegnet]

Add support for macOS color tags on macOS and other systems.

A tag is represented as a string containing:

• A tag name (predefined or user-defined).
• Optionally, a color code after a \n.

See also https://eclecticlight.co/2024/12/24/solving-finder-tag-problems

On macOS, the extended attribute name for tags is consistent with Finder

• com.apple.metadata:_kMDItemUserTags

On other systems, the extended attribute name for macOS tags may vary
depending on the copy method (e.g. Samba, rsync)

• user.DosStream.com.apple.metadata:_kMDItemUserTags:$DATA
• user.com.apple.metadata:_kMDItemUserTags

Tests

Code example olegnet@057c1fa

Problem description https://github.com/orgs/eza-community/discussions/1639

Screenshot

[MartinFillon]

Hi, thanks for your contribution, this looks good to me. If you know a way to test it with our current testing, please add it otherwise this is great