include license file in zcomponents crate source

[ghost]

Hi. i am packaging zcomponents in fedora and it would be easier to have the file include in the crate source. Here the fedora license guide: https://docs.fedoraproject.org/en-US/packaging-guidelines/LicensingGuidelines/#_license_text Here the fedora guideline for rust: https://docs.fedoraproject.org/en-US/packaging-guidelines/Rust/

[ozkriff]

@remilauzier done!

[ghost]

Thanks!