feat(taxonomy): add color picker to term edit and creation

Integrated a color picker for the publication status taxonomy terms.
- Added color fields to both term edit and add new term screens.
- Enqueued color picker script and styles.
- Implemented saving mechanism for color data.

This enhances user experience by allowing custom colors assignment to taxonomy terms.

assets/js/custom-color-picker.js

@@ -0,0 +1,3 @@
+jQuery(document).ready(function($) {
+    $('.color-field').wpColorPicker();
+});

functions.php

@@ -266,6 +266,66 @@ function create_publication_status_taxonomy()
 
 add_action('init', 'create_publication_status_taxonomy', 0);
 
+// Add color picker to publication status taxonomy
+function add_publication_status_color_field($term)
+{
+    $color = get_term_meta($term->term_id, 'publication_status_color', true);
+?>
+    <tr class="form-field">
+        <th scope="row" valign="top">
+            <label for="publication_status_color"><?php _e('Color', 'duck-behavior-journal'); ?></label>
+        </th>
+        <td>
+            <input type="text" name="publication_status_color" id="publication_status_color" value="<?php echo esc_attr($color) ? esc_attr($color) : '#ffffff'; ?>" class="color-field" />
+            <p class="description"><?php _e('Choose a color for this publication status.', 'duck-behavior-journal'); ?></p>
+        </td>
+    </tr>
+<?php
+}
+
+add_action('publication_status_edit_form_fields', 'add_publication_status_color_field', 10, 2);
+
+// Add color picker to add new term screen
+function add_publication_status_color_field_new($term)
+{
+?>
+    <div class="form-field">
+        <label for="publication_status_color"><?php _e('Color', 'duck-behavior-journal'); ?></label>
+        <input type="text" name="publication_status_color" id="publication_status_color" value="#ffffff" class="color-field" />
+        <p class="description"><?php _e('Choose a color for this publication status.', 'duck-behavior-journal'); ?></p>
+    </div>
+<?php
+}
+
+add_action('publication_status_add_form_fields', 'add_publication_status_color_field_new', 10, 2);
+
+// Save the color meta data
+function save_publication_status_color_meta($term_id)
+{
+    if (isset($_POST['publication_status_color']) && !empty($_POST['publication_status_color'])) {
+        update_term_meta($term_id, 'publication_status_color', sanitize_hex_color($_POST['publication_status_color']));
+    } else {
+        delete_term_meta($term_id, 'publication_status_color');
+    }
+}
+
+add_action('edited_publication_status', 'save_publication_status_color_meta', 10, 2);
+add_action('create_publication_status', 'save_publication_status_color_meta', 10, 2);
+
+// Enqueue the color picker script
+function enqueue_color_picker($hook_suffix)
+{
+    // Load only on the term edit page
+    if (strpos($hook_suffix, 'edit-tags.php') === false) {
+        return;
+    }
+
+    wp_enqueue_style('wp-color-picker');
+    wp_enqueue_script('custom-color-picker', get_template_directory_uri() . '/assets/js/custom-color-picker.js', array('wp-color-picker'), false, true);
+}
+
+add_action('admin_enqueue_scripts', 'enqueue_color_picker');
+
 function add_article_meta_boxes()
 {
     add_meta_box(