feat: add LoadingBar component with known and unknown states

src/pages/index.astro

@@ -10,6 +10,7 @@ import Link from '../components/Link/link.astro';
 import ListItem from '../components/ListItem/listItem.astro';
 import ListItemTitle from '../components/ListItem/listItemTitle.astro';
 import ListItemSubtitle from '../components/ListItem/listItemSubtitle.astro';
+import LoadingBar from '../components/LoadingBar/loadingBar.astro';
 import {
   Arrow2Icon, BinIcon, BurgerIcon, CalendarIcon, CheckIcon, CloseIcon,
   CodeIcon, CubeIcon, DownloadIcon, FilterIcon, HelpIcon, HomeIcon,
@@ -24,6 +25,14 @@ const initialChecked = true;
 <Layout>
   <main>
     <h1>Nova Design System</h1>
+    <section>
+      <h2>Loading Bar</h2>
+      <div style="display: flex; flex-direction: column; gap: var(--nds-spacing-md);">
+        <LoadingBar type="known" percentage={75} width="500px" />
+        <LoadingBar type="unknown" width="500px" />
+      </div>
+      </div>
+    </section>
     <section>
       <h2>List Item</h2>
       <div style="display: flex; flex-direction: column; gap: var(--nds-spacing-md);">