[Mammoth] Move remaining classes to a shared folder.

lib/mammoth/util/debug.h

@@ -0,0 +1,20 @@
+#pragma once
+
+#include <glacier/string/str_format.h>
+#include <glacier/string/string_view.h>
+#include <stdint.h>
+#include <ztypes.h>
+
+// TODO: Take StringView here instead.
+void dbgln(const glcr::String& string);
+
+template <typename... Args>
+void dbgln(const glcr::StringView& fmt, Args... args) {
+  dbgln(StrFormat(fmt, args...));
+}
+
+// Checks that the code is ok.
+// if not exits the process.
+void check(uint64_t);
+
+void crash(const char*, z_err_t);