* feat: Add Go code to binary search recursion under divide and conquer
* style: Code comment standardization
* style: modify function comment
* fix: fixed error when the list is empty
* Update print_utils.go
* Delete print_utils_test.go
* feat: add Go code to divide and conquer
* Update build_tree.go
* style: modify function name
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Co-authored-by: Yudong Jin <krahets@163.com>
