[10.x] Add wordWrap to Str

[joshbonnick]

This PR adds wordWrap the Stringable API.

What It Does

The method is a wrapper for the wordwrap function which is used to split strings with a given string by character length.

Without this change we would need to do the following to achieve the word wrapping

str(wordwrap($string, width: 20))

Use Cases

The PHP documentation for the function shows an example of adding <br /> elements into a string, however, that seems like a problem you solve with styling.

My own personal use case was to split a string into chunks so they could be used in an svg template, rendered by Blade to be passed to an image generating service.

The string would be split into chunks of 25 characters then passed to the template as a Collection (shown below).

public function using(string $title): self
{
    return tap($this, function() use ($title) {
        $this->title_parts = str($title)->wordWrap(characters: 25, break: PHP_EOL)->explode(PHP_EOL);
    });
}