[Mammoth] Move remaining classes to a shared folder.

lib/mammoth/src/new.cpp

@@ -1,9 +0,0 @@
-#include <stdint.h>
-#include <stdlib.h>
-
-[[nodiscard]] void* operator new(uint64_t size) { return malloc(size); }
-[[nodiscard]] void* operator new[](uint64_t size) { return malloc(size); }
-
-void operator delete(void*, uint64_t) {}
-void operator delete[](void*) {}
-void operator delete[](void*, uint64_t) {}