Allow MediaEmbed customization

[harmenjanssen]

This enables developers to configure custom settings for the mediaEmbed section as outlined in the CKEditor MediaEmbedConfig documentation.

Example Laravel code:

// file: config/ckeditor5Classic.php

return [
    // ... rest of config
    'mediaEmbed' => [
        'extraProviders' => [
            [
                'name' => 'Example.com',
                'url' => '/^example\.com\/media\/(\w+)/',
                'html' => '<p>Example $1</p>',
            ],
        ],
        'previewsInData' => true,
    ],
];

I need some custom media providers in my project, so hopefully this can be merged into the project!

Thanks in advance, let me know if you'd like to see changes.

[harmenjanssen]

Hi! Is there an update on this? I need this functionality in my project and would really like to avoid using a fork.

Thanks!

[yakovlef]

This is a great PR, accept!