[Mammoth] Add Channel object for simple IPC messages

lib/mammoth/include/mammoth/debug.h

@@ -1,9 +1,12 @@
 #pragma once
 
 #include <stdint.h>
+#include <zerrors.h>
 
 void dbgln(const char*);
 
 // Checks that the code is ok.
 // if not exits the process.
 void check(uint64_t);
+
+void crash(const char*, z_err_t);