Import PackageName from uv-normalize (#15439)

## Summary

This might be unintentional? `PackageName` is re-exported from
`uv-pep508`, so some crates import it from there.

crates/uv-scripts/src/lib.rs

@@ -10,8 +10,8 @@ use thiserror::Error;
 use url::Url;
 
 use uv_configuration::SourceStrategy;
+use uv_normalize::PackageName;
 use uv_pep440::VersionSpecifiers;
-use uv_pep508::PackageName;
 use uv_pypi_types::VerbatimParsedUrl;
 use uv_redacted::DisplaySafeUrl;
 use uv_settings::{GlobalOptions, ResolverInstallerSchema};