Allow the configuration of the amount of embeds per content

Problem/Motivation

We want to Limit the amount of Embeds we can actually have on a single page and update the whitelisting URL functions

Proposed resolution

You can use:

$config = \Drupal::configFactory()->getEditable('social_embed.settings');

  // Add the new configuration value if it doesn't already exist.
  if (!$config->get('max_embeds_per_content')) {
    $config->set('max_embeds_per_content', '5');
    $config->save();
  }