Enhance logging and task management; enable trace facility, add scheduler state logging, and improve shutdown handling

software/init.zig

@@ -4,7 +4,8 @@ pub fn main() void {
     _ = add(1, 2);
     while (true) {
         nova64.log("Hello from Zig!");
-        // nova64.yield(1000);
+        // nova64.yield();
+        // nova64.sleep(1000);
     }
 }