Formatação (cargo fmt) e ajustes do clippy para o CI da 1.0.0

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

crates/guara-core/src/fs/mod.rs

@@ -10,8 +10,8 @@ pub mod exfat;
 pub mod ext;
 pub mod fat;
 pub mod hfsplus;
-pub mod xfs;
 pub mod ntfs;
+pub mod xfs;
 
 use crate::signatures::{category_for_ext, matches_ext};
 use crate::source::{read_vec, Source};