feat(routines): add typed Rust scalar-name allocation (#91)

Add a pure post-ABI naming stage with transient UTF-8 hex labels, payload-preserving output, deterministic validation, duplicate detection, and resource-safe construction.

Author: jscott3201

tools/routine-compiler/src/lib.rs

@@ -1,5 +1,6 @@
 mod declarations;
 pub mod resolution;
 pub mod scalar_abi;
+pub mod scalar_names;
 
 pub use declarations::verify_release_declarations;