Function padTo

padTo(str: string, multiple?: number, fill?: string | number): string
Pads a string at the end so that its length is a multiple of the specified block size.
Parameters
- str: string
  The input string to pad
- multiple: number = 4
  The block size or multiple to align to (default: 4)
- fill: string | number = '='
  The fill character or string to append (default: '=')
Returns string
The padded string aligned to the multiple
Example
```
padTo('abc', 4, '='); // 'abc='
padTo('abcd', 4, '='); // 'abcd'
```
- Defined in packages/library/src/common/primitives/string.library.ts:314