Function pad

pad(
    nbr?: string | number | bigint,
    len?: number,
    fill?: string | number,
): string
Pads a string or number with a leading fill character to reach a specified length.
Parameters
- nbr: string | number | bigint = 0
  The input value to pad
- len: number = 2
  The target length (default: 2)
- Optionalfill: string | number
  The fill character (default: space for strings, zero for numbers)
Returns string
The left-padded string
Example
```
pad(5, 2); // '05'
```
- Defined in packages/library/src/common/string.library.ts:272