refactor: Move #![forbid(unsafe_code)] attributes up

What's forbidden is more important than which clippy lints are
ignored and more important directives should come first.

ruff_cli/src/lib.rs

@@ -2,6 +2,7 @@
 //! to automatically update the `ruff --help` output in the `README.md`.
 //!
 //! For the actual Ruff library, see [`ruff`].
+#![forbid(unsafe_code)]
 #![allow(clippy::must_use_candidate, dead_code)]
 
 mod cli;

ruff_cli/src/main.rs

@@ -1,10 +1,10 @@
+#![forbid(unsafe_code)]
 #![allow(
     clippy::match_same_arms,
     clippy::missing_errors_doc,
     clippy::module_name_repetitions,
     clippy::too_many_lines
 )]
-#![forbid(unsafe_code)]
 
 use std::io::{self};
 use std::path::{Path, PathBuf};