Description

This pull request enhances the Onym package by making the separator used across different strategies fully customizable.

Previously, the timestamp(), date(), and numbered() methods hard-coded the separator (e.g., underscore _) into their generated filenames. There was no way to override it dynamically through options.

This PR introduces:

• Support for a separator option in all relevant methods (timestamp, date, numbered, and slug).
• Fallback to a defaultSeparator if no separator is provided in options.
• The ability to override options and defaultSeparator through the constructor, making the class easier to customize and test.

Example usage:

use Blaspsoft\Onym\Onym;

// Set a custom default separator
$onym = new Onym([], ' ');
$filename = $onym->timestamp('invoice', 'pdf'); // 2024-03-15 invoice.pdf

// Or override per call
$filename = $onym->timestamp('invoice', 'pdf', ['separator' => ' ']); // 2024-03-15 invoice.pdf