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.

apps/api/src/utils/audience-member-status.ts

@@ -0,0 +1,23 @@
+export type AudienceMemberStatus = 'active' | 'pending' | 'expired' | 'revoked';
+
+export function deriveAudienceMemberStatus(
+  profileId: string | null,
+  invite: { acceptedAt: string | null; isRevoked: boolean; expiresAt: string } | undefined
+): AudienceMemberStatus {
+  if (profileId) {
+    return 'active';
+  }
+  if (invite?.acceptedAt) {
+    return 'active';
+  }
+  if (!invite) {
+    return 'pending';
+  }
+  if (invite.isRevoked) {
+    return 'revoked';
+  }
+  if (new Date(invite.expiresAt) <= new Date()) {
+    return 'expired';
+  }
+  return 'pending';
+}