Define `#[panic_handler]` printing the error

With https://github.com/0xMiden/compiler/pull/1319 we can now print everything. :)

Look for the existing panic handler or where panics are defined in the codebase, likely in a lib.rs or main.rs. The linked PR #1319 shows new printing capabilities; examine its changes to understand the available printing interface. Implement a `#[panic_handler]` that uses this new interface to print the panic error message. Test by triggering a panic in a simple test program.

Scritto dal modello di indicizzazione a partire dal testo della issue.