Function flattenArray

flattenArray<T>(arr: (T | T[])[]): T[]
Recursively flattens an array of nested arrays into a single-level array.
Type Parameters
- T
  The type of elements in the array.
Parameters
- arr: (T | T[])[]
  The array to flatten, which may contain nested arrays.
Returns T[]
A new array with all nested elements flattened into a single level.
Example: Imports
```
// ES Module
import { flattenArray } from '@bnidev/js-utils'

// CommonJS
const { flattenArray } = require('@bnidev/js-utils')
```
Example: Usage
```
const nestedArray = [1, [2, 3], [[4]], 5]
const flatArray = flattenArray(nestedArray)
console.log(flatArray) // Output: [1, 2, 3, 4, 5]
```
- Defined in array/flattenArray.ts:27