Function stringToArray

stringToArray(argument: string | string[]): string[]
Normalizes a string or array of strings to a new array. Existing arrays are copied so callers can change the result independently.
Parameters
- argument: string | string[]
  One string or an array of strings.
Returns string[]
A new array containing the supplied strings.
Example
```
import { stringToArray } from "@nshiab/simple-data-analysis-core/helpers";
console.log(stringToArray("name")); // ["name"]
console.log(stringToArray(["name", "age"])); // ["name", "age"]
```