feat(form): add merge form functionality (#4495)

* feat: captcha example

* fix: fix lint errors

* chore: event handling and methods

* chore: add accessibility features ARIA labels and roles

* refactor: refactor code structure and improve captcha demo page

* feat: add captcha internationalization

* chore: 适配时间戳国际化展示

* fix: 1. 添加点击位置边界校验，防止点击外部导致x,y误差。2. 演示页面宽度过长添加滚动条。3. 添加hooks

* feat: sync test

* feat: 添加合并表单功能

* fix: 修复上一步不展示问题

---------

Co-authored-by: vince <vince292007@gmail.com>

playground/src/router/routes/modules/examples.ts

@@ -99,6 +99,14 @@ const routes: RouteRecordRaw[] = [
               title: $t('page.examples.form.api'),
             },
           },
+          {
+            name: 'FormMergeExample',
+            path: '/examples/form/merge',
+            component: () => import('#/views/examples/form/merge.vue'),
+            meta: {
+              title: $t('page.examples.form.merge'),
+            },
+          },
         ],
       },
       {