Ran cargo fmt, clippy fixes, suppressed some warns

I will start working on stack traces tonight and tomorrow.

We need to be able to 'unwind' by finding calling functions.

kernel/src/arch/x86_64/processing/mod.rs

@@ -1,3 +1,4 @@
+#![expect(unused)]
 pub mod async_io;
-pub mod threading;
 mod taskrunner;
+pub mod threading;