* ✨ feat(rust/tree): add binary_tree_dfs * ✨ feat(rust/tree): add binary_tree_bfs * 🐞 fix(rust/tree): can't list to any kind of tree * ✨feat(rust/tree): add binary_search_tree * Update binary_search_tree.rs * 🐞 fix(rust/tree): corret writing mistakes * 🦄 refactor(rust/tree): remove get_next_node() function * Update binary_search_tree.rs --------- Co-authored-by: Yudong Jin <krahets@163.com>