chore: Forbid unsafe code and allow unneeded clippy lint

Signed-off-by: Christoph Heiss <christoph@c8h4.io>

src/main.rs

@@ -1,5 +1,8 @@
 // SPDX-License-Identifier: MIT
 
+#![forbid(unsafe_code)]
+#![allow(clippy::uninlined_format_args)]
+
 mod login;
 mod vault;