Review Swift codes ( #1150 )
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* feat(swift): review for chapter_computational_complexity
* feat(swift): review for chapter_data_structure
* feat(swift): review for chapter_array_and_linkedlist
* feat(swift): review for chapter_stack_and_queue
* feat(swift): review for chapter_hashing
* feat(swift): review for chapter_tree
* feat(swift): add codes for heap article
* feat(swift): review for chapter_heap
* feat(swift): review for chapter_graph
* feat(swift): review for chapter_searching
* feat(swift): review for chapter_sorting
* feat(swift): review for chapter_divide_and_conquer
* feat(swift): review for chapter_backtracking
* feat(swift): review for chapter_dynamic_programming
* feat(swift): review for chapter_greedy
* feat(swift): review for utils
* feat(swift): update ci tool
* feat(swift): trailing closure
* feat(swift): array init
* feat(swift): map index
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