refactor(uishell): rename files

src/components/UIShell/GlobalHeader/HeaderNavItem.svelte

@@ -0,0 +1,23 @@
+<script>
+  export let href = undefined;
+  export let text = undefined;
+  import { cx } from '../../../lib';
+</script>
+
+<li>
+  <a
+    class={cx('--header__menu-item')}
+    role="menuitem"
+    tabindex="0"
+    on:click
+    on:mouseover
+    on:mouseenter
+    on:mouseleave
+    on:keyup
+    on:keydown
+    on:focus
+    on:blur
+    {href}>
+    <span class={cx('--text-truncate--end')}>{text}</span>
+  </a>
+</li>