add unit tests

tests/index.test.ts

@@ -0,0 +1,16 @@
+import { describe, expect, it } from 'vitest';
+import * as webUi from '../src/index';
+
+describe('index exports', () => {
+    it('exposes runtime component exports', () => {
+        expect(typeof webUi.Button).toBe('function');
+        expect(typeof webUi.Chip).toBe('function');
+        expect(typeof webUi.DatePicker).toBe('function');
+        expect(typeof webUi.Dropdown).toBe('function');
+        expect(typeof webUi.Form).toBe('function');
+        expect(typeof webUi.InputField).toBe('function');
+        expect(typeof webUi.Label).toBe('function');
+        expect(typeof webUi.SidebarNavItem).toBe('function');
+        expect(typeof webUi.Table).toBe('function');
+    });
+});