Adding some simple tests. (#54)

packages/cli/src/index.test.ts

@@ -0,0 +1,9 @@
+import { describe, it, expect } from 'vitest';
+import { toolRegistry } from './tools/tool-registry.js';
+
+describe('cli tests', () => {
+  it('should have a tool registry', () => {
+    expect(toolRegistry).toBeDefined();
+    expect(typeof toolRegistry.registerTool).toBe('function');
+  });
+});