style: apply rustfmt to entire codebase

- Fix all formatting issues for CI compliance
- Consistent code style across all files
- Proper struct/enum formatting
- Fixed import ordering

examples/benchmark_single.rs

@@ -34,4 +34,3 @@ fn main() {
         }
     }
 }
-

examples/parse.rs

@@ -20,4 +20,3 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
 
     Ok(())
 }
-

examples/validate.rs

@@ -27,4 +27,3 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
 
     Ok(())
 }
-