feat(renderer): add shadcn label primitive

tests/component/ui/label.test.tsx

@@ -0,0 +1,17 @@
+import { describe, it, expect } from 'vitest';
+import { render, screen } from '@testing-library/react';
+import { Label } from '@/components/ui/label';
+
+describe('Label', () => {
+  it('renders children and associates with a control', () => {
+    render(
+      <>
+        <Label htmlFor="x">Username</Label>
+        <input id="x" />
+      </>
+    );
+    const label = screen.getByText(/username/i);
+    expect(label).toBeInTheDocument();
+    expect(label.tagName).toBe('LABEL');
+  });
+});