Merge branch '3-feat-add-menu' into 'main'

Resolve "feat: add menu"

Closes #3

See merge request !3

src/theme/Navbar/Layout/index.js

+import React from 'react';
+import clsx from 'clsx';
+import {useThemeConfig} from '@docusaurus/theme-common';
+import {
+  useHideableNavbar,
+  useNavbarMobileSidebar,
+} from '@docusaurus/theme-common/internal';
+import NavbarMobileSidebar from '@theme/Navbar/MobileSidebar';
+import styles from './styles.module.css';
+
+
+function NavbarBackdrop(props) {
+  return (
+    <div
+      role="presentation"
+      {...props}
+      className={clsx('navbar-sidebar__backdrop', props.className)}
+    />
+  );
+}
+export default function NavbarLayout({children}) {
+  const {
+    navbar: {hideOnScroll, style},
+  } = useThemeConfig();
+  const mobileSidebar = useNavbarMobileSidebar();
+  const {navbarRef, isNavbarVisible} = useHideableNavbar(hideOnScroll);
+  return (
+    <nav
+      ref={navbarRef}
+      className={clsx(
+        'navbar',
+        'navbar--fixed-top',
+        hideOnScroll && [
+          styles.navbarHideable,
+          !isNavbarVisible && styles.navbarHidden,
+        ],
+        {
+          'navbar--dark': style === 'dark',
+          'navbar--primary': style === 'primary',
+          'navbar-sidebar--show': mobileSidebar.shown,
+        },
+      )}>
+      {children}
+      <NavbarBackdrop onClick={mobileSidebar.toggle} />
+      <NavbarMobileSidebar />
+    </nav>
+  );
+}

src/theme/Navbar/Layout/styles.module.css

+.navbarHideable {
+  transition: var(--ifm-transition-fast) ease;
+}
+
+.navbarHidden {
+  background-color: var(--ifm-background-surface-color);
+  box-shadow: var(--ifm-navbar-shadow)
+}