feat: create child theme with brandbook styles and fonts

GeneratePress child theme bitwms-child with full brandbook CSS (corporate
pink #E50071, Suisse Int'l typography, utility classes), PHP bootstrap, and
sidebar navigation JS placeholder ready for Task 3.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

wp-content/themes/bitwms-child/inc/enqueue.php

@@ -0,0 +1,28 @@
+<?php
+/**
+ * БИТ.WMS Child Theme — inc/enqueue.php
+ *
+ * Registers and enqueues theme scripts.
+ * Loaded by functions.php via the $bitwms_includes array.
+ *
+ * @package bitwms-child
+ */
+
+if ( ! defined( 'ABSPATH' ) ) {
+    exit;
+}
+
+add_action( 'wp_enqueue_scripts', 'bitwms_enqueue_scripts' );
+
+function bitwms_enqueue_scripts() {
+    $theme_version = wp_get_theme()->get( 'Version' );
+
+    // Sidebar navigation — loaded in footer (5th arg: true).
+    wp_enqueue_script(
+        'bitwms-sidebar-nav',
+        get_stylesheet_directory_uri() . '/js/sidebar-nav.js',
+        array(),           // no dependencies
+        $theme_version,
+        true               // load in footer
+    );
+}