feat: add Jest testing framework and CI/CD configuration (#187)

Co-authored-by: samanhappy@qq.com <my6051199>

tests/basic.test.ts

@@ -0,0 +1,17 @@
+// Simple test to verify Jest configuration
+describe('Jest Configuration', () => {
+  it('should be working correctly', () => {
+    expect(1 + 1).toBe(2);
+  });
+
+  it('should support async operations', async () => {
+    const promise = Promise.resolve('test');
+    await expect(promise).resolves.toBe('test');
+  });
+  it('should have custom matchers available', () => {
+    const date = new Date();
+    // Test custom matcher - this will fail if setup is not working
+    expect(typeof date.getTime()).toBe('number');
+    expect(date.getTime()).toBeGreaterThan(0);
+  });
+});