chore: add new component statistics (#22159)

* statistic：新增statistic组件，用于数值展示和倒计时

Co-authored-by: yang <29636098325@qq.com>

test/unit/specs/statistic.spec.js

@@ -0,0 +1,15 @@
+import { createTest, destroyVM } from '../util';
+import Statistic from 'packages/statistic';
+
+describe('Statistic', () => {
+  let vm;
+  afterEach(() => {
+    destroyVM(vm);
+  });
+
+  it('create', () => {
+    vm = createTest(Statistic, true);
+    expect(vm.$el).to.exist;
+  });
+});
+