Enhance audience management features with new components and API integrations

- Added `AssignCoursesModal`, `AudienceMemberRow`, `AudienceTable`, and related components for improved audience management UI.
- Implemented audience invite actions including resend and revoke functionality.
- Updated audience API to support importing members and assigning courses.
- Refactored audience data handling to include status and invite management.
- Improved overall user experience with pagination and selection features in the audience table.

packages/ui/src/custom/back-button/back-button.svelte

@@ -0,0 +1,20 @@
+<script lang="ts">
+  import ArrowLeftIcon from '@lucide/svelte/icons/arrow-left';
+  import { cn } from '../../tools';
+  import { Button } from '../../base/button';
+
+  interface Props {
+    href: string;
+    label?: string;
+    class?: string;
+  }
+
+  let { href, label, class: className }: Props = $props();
+</script>
+
+<Button variant="link" class={cn('ui:h-fit! ui:justify-start! ui:p-0', className)} {href}>
+  <ArrowLeftIcon class="custom" />
+  {#if label}
+    <span class="ui:text-xs">{label}</span>
+  {/if}
+</Button>

packages/ui/src/custom/back-button/index.ts

@@ -0,0 +1,4 @@
+import BackButton from './back-button.svelte';
+
+export { BackButton };
+export { BackButton as default };