docs: update docs (#4466)

* chore: fixed known issues with form components

* docs: add vben form doc

docs/src/demos/vben-form/custom/index.vue

@@ -0,0 +1,68 @@
+<script lang="ts" setup>
+import { h } from 'vue';
+
+import { Input, message } from 'ant-design-vue';
+
+import { useVbenForm } from '#/adapter';
+
+const [Form] = useVbenForm({
+  // 所有表单项共用，可单独在表单内覆盖
+  commonConfig: {
+    // 所有表单项
+    componentProps: {
+      class: 'w-full',
+    },
+    labelClass: 'w-2/6',
+  },
+  // 提交函数
+  handleSubmit: onSubmit,
+  // 垂直布局，label和input在不同行，值为vertical
+  // 水平布局，label和input在同一行
+  layout: 'horizontal',
+  schema: [
+    {
+      // 组件需要在 #/adapter.ts内注册，并加上类型
+      component: 'Input',
+      fieldName: 'field',
+      label: '自定义后缀',
+      suffix: () => h('span', { class: 'text-red-600' }, '元'),
+    },
+    {
+      component: 'Input',
+      fieldName: 'field1',
+      label: '自定义组件slot',
+      renderComponentContent: () => ({
+        prefix: () => 'prefix',
+        suffix: () => 'suffix',
+      }),
+    },
+    {
+      component: h(Input, { placeholder: '请输入' }),
+      fieldName: 'field2',
+      label: '自定义组件',
+      rules: 'required',
+    },
+    {
+      component: 'Input',
+      fieldName: 'field3',
+      label: '自定义组件(slot)',
+      rules: 'required',
+    },
+  ],
+  wrapperClass: 'grid-cols-1',
+});
+
+function onSubmit(values: Record<string, any>) {
+  message.success({
+    content: `form values: ${JSON.stringify(values)}`,
+  });
+}
+</script>
+
+<template>
+  <Form>
+    <template #field3="slotProps">
+      <Input placeholder="请输入" v-bind="slotProps" />
+    </template>
+  </Form>
+</template>