[site-reviews] Add a category dropdown to the form

//
// ADDING CUSTOM FIELDS TO THE SUBMISSION FORM IS NOT ACTIVELY SUPPORTED!
// However, if you would like to add a category dropdown to the form, this should help get you started.
// This will only work in Site Review v5
//

/**
 * Adds a category dropdown field to the Site Reviews submission form.
 * Paste this in your active theme's functions.php file.
 * @param array $fields
 * @return array
 */
add_filter('site-reviews/config/forms/review-form', function ($fields) {
    $categories = get_terms([
        'count' => false,
        'fields' => 'id=>name',
        'hide_empty' => false,
        'taxonomy' => glsr()->taxonomy,
    ]);
    if (is_wp_error($categories)) {
        glsr_log()->error($categories->get_error_message());
        return $fields;
    }
    $fields['assigned_terms'] = [
        'label' => 'Category',
        'required' => true,
        'options' => ['' => __('Select a category', 'site-reviews')] + $categories,
        'type' => 'select',
    ];
    return $fields;
});