A basic clang-format Rust wrapper.
This allows for formatting a given input using `clang-format` from the system.
```rust
let input = r#"
"#;
let output = clang_format_with_style(input, &ClangFormatStyle::Mozilla);
assert!(output.is_ok());
assert_eq!(output.unwrap(), "\nstruct Test\n{};\n");
```