Add OptionsMetadata macro to uv (#5063)

## Summary

The bulk of the change is copied directly from Ruff:

-
dc8db1afb0/crates/ruff_workspace/src/options_base.rs
-
dc8db1afb0/crates/ruff_macros/src/config.rs

crates/uv-settings/src/lib.rs

@@ -10,6 +10,7 @@ pub use crate::combine::*;
 pub use crate::settings::*;
 
 mod combine;
+pub mod options_base;
 mod settings;
 
 /// The [`Options`] as loaded from a configuration file on disk.