refactor(vite_glob): remove AnchoredGlob and walk module

Move AnchoredGlob and the filesystem walk logic out of vite_glob,
leaving only the core glob matching and error types.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: branchseer

crates/vite_glob/src/anchored.rs

@@ -1,11 +1,8 @@
-mod anchored;
 mod error;
-pub mod walk;
 
 #[expect(clippy::disallowed_types, reason = "wax::Glob::is_match requires std::path::Path")]
 use std::path::Path;
 
-pub use anchored::AnchoredGlob;
 pub use error::Error;
 use wax::{Glob, Program};