* ✨ feat(rust/hashing): add array_hash_map * 📃 docs(rust/hashing): correct comments * ✨ feat(rust/include): add tree_node * ✨ feat(rust/include): add print_tree * ✨ feat(rust/tree): add binary_tree * docs(rust/tree): correct comments * 📃 docs(rust/tree): correct comments