Add option to display quick actions on top level paragraphs only

1.Configuration Setting
Add a new checkbox in the module's configuration form:

$form['top_level_only'] = [
  '#type' => 'checkbox',
  '#title' => $this->t('Show quick actions for top-level paragraphs only'),
  '#default_value' => $settings['top_level_only'] ?? FALSE,
  '#description' => $this->t('When enabled, quick actions will only appear for paragraphs that are not nested within other paragraphs.'),
];

2.Paragraph Detection Logic
Modify the action rendering logic to check paragraph hierarchy:

function paragraphs_edit_should_show_actions(ParagraphInterface $paragraph) {
  $config = \Drupal::config('paragraphs_edit.settings');
  
  if ($config->get('top_level_only')) {
    $parent = $paragraph->getParentEntity();
    return !($parent instanceof ParagraphInterface);
  }
  
  return TRUE;
}

3.JavaScript Modifications
Update the frontend logic to respect this setting:

Drupal.behaviors.paragraphsEdit = {
  attach: function (context, settings) {
    if (settings.paragraphsEdit.topLevelOnly) {
      // Only attach handlers to top-level paragraphs
      $(context).find('.paragraph--type:not(.paragraph--type--nested)').once('paragraphs-edit').each(function() {
        // Attach quick actions
      });
    } else {
      // Existing behavior
    }
  }
};

New configuration option in /admin/config/content/paragraphs_edit

abhishek@kumar #2 looks good

please provide a merge request for testing