docs: update docs (#4466)

* chore: fixed known issues with form components

* docs: add vben form doc

playground/src/views/examples/form/dynamic.vue

@@ -9,6 +9,17 @@ const [Form, formApi] = useVbenForm({
   // 提交函数
   handleSubmit: onSubmit,
   schema: [
+    {
+      component: 'Input',
+      defaultValue: 'hidden value',
+      dependencies: {
+        show: false,
+        // 随意一个字段改变时，都会触发
+        triggerFields: ['field1Switch'],
+      },
+      fieldName: 'hiddenField',
+      label: '隐藏字段',
+    },
     {
       component: 'Switch',
       defaultValue: true,