refactor(tail): Improve code readability in `tail`

[mass2527]

this change not only improve code readability but also improve performance in large array.

i ran this bench to check tail in large array

import { bench, describe } from 'vitest';
import { tail as tailToolkit } from 'es-toolkit';
import { tail as tailLodash } from 'lodash';

// Helper function to generate a large array
function generateLargeArray(size) {
  return Array.from({ length: size }, (_, index) => index);
}

describe('tail', () => {
  const largeArray = generateLargeArray(1000000);

  bench('es-toolkit/tail', () => {
    tailToolkit(largeArray);
  });

  bench('lodash/tail', () => {
    tailLodash(largeArray);
  });
});

updated code is more faster than original code.

before

after

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Name	Status	Preview	Comments	Updated (UTC)
es-toolkit	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 29, 2024 1:09pm

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 99.77%. Comparing base (b9966aa) to head (f2b628f).

Additional details and impacted files

[](https://app.codecov.io/gh/toss/es-toolkit/pull/443?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=toss) ```diff @@ Coverage Diff @@ ## main #443 +/- ## ========================================== - Coverage 99.77% 99.77% -0.01% ========================================== Files 165 165 Lines 1325 1321 -4 Branches 357 357 ========================================== - Hits 1322 1318 -4 Misses 2 2 Partials 1 1 ```