* add last function
* add last test case
* add last bench mark
* add last docs
* fix ko last docs comment
* add last en.mts, ko.mts
* Update src/array/last.ts
* Update src/array/last.spec.ts
* Update docs/reference/array/last.md
* Update docs/ko/reference/array/last.md
* Update docs/ko/reference/array/last.md
* Update docs/reference/array/last.md
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Co-authored-by: Sojin Park <raon0211@gmail.com>