Move memory_manager and assert into kutil.

src/modules/kutil/assert.h

@@ -0,0 +1,19 @@
+#pragma once
+
+namespace kutil {
+
+using assert_callback =
+	[[noreturn]] void (*)
+	(const char *file, unsigned line, const char *message);
+
+/// Set the global kernel assert callback
+/// \args f   The new callback
+/// \returns  The old callback
+assert_callback assert_set_callback(assert_callback f);
+
+extern assert_callback __kernel_assert_p;
+
+} // namespace kutil
+
+
+#define kassert(stmt, message)  if(!(stmt)) { ::kutil::__kernel_assert_p(__FILE__, __LINE__, (message)); } else {}