feat: add Kani proofs for delegation non-escalation across types, domain, and kernel

crates/kernel/src/lib.rs

@@ -1,6 +1,8 @@
 #![no_std]
 
 pub mod interrupt;
+#[cfg(kani)]
+pub mod proofs;
 pub mod syscall;
 
 pub use syscall::{SyscallOutcome, SyscallResult};