Print informative panic message in release build

kernel/src/main.rs

@@ -217,7 +217,23 @@ fn panic(panic_info: &PanicInfo) -> ! {
     if let Some(mut locked_term) = TERMINAL.as_inner().try_lock() {
         // The terminal may not yet be initialized.
         if let Some(ref mut term) = &mut *locked_term {
-            let _ = core::fmt::write(term, format_args!("\x1B[1;31m{}\x1B[m", panic_info));
+            if !cfg!(debug_assertions) {
+                // Clear the screen
+                term.print("\x1B[H\x1B[2J");
+            }
+            term.print("\x1B[1;31m");
+            if !cfg!(debug_assertions) {
+                term.print(
+                    "KERNEL PANIC\n\n\
+                    A severe error has occurred in the Doors operating system and it has been shut \
+                    down. If this is a reproducible or recurring issue, you may want to file a bug \
+                    report at https://github.com/SamZhang3/doors-rs, with the below information and \
+                    possibly other details regarding what actions trigger the problem.\n\n\
+                    Technical details:",
+                );
+            }
+            let _ = core::fmt::write(term, format_args!("\n{}", panic_info));
+            term.print("\x1B[m");
         }
     }