feat: improve vbenCheckButtonGroup (#6329)

* 按钮组支持单选清除和多选限制最大选项数

* 按钮组支持icon插槽来定制图标

playground/src/views/examples/button-group/index.vue

@@ -9,6 +9,7 @@ import {
   VbenButtonGroup,
   VbenCheckButtonGroup,
 } from '@vben/common-ui';
+import { LoaderCircle, Square, SquareCheckBig } from '@vben/icons';
 
 import { Button, Card, message } from 'ant-design-vue';
 
@@ -51,6 +52,7 @@ const compProps = reactive({
   gap: 0,
   showIcon: true,
   size: 'middle',
+  allowClear: false,
 } as Recordable<any>);
 
 const [Form] = useVbenForm({
@@ -63,6 +65,9 @@ const [Form] = useVbenForm({
       }
     });
   },
+  commonConfig: {
+    labelWidth: 150,
+  },
   schema: [
     {
       component: 'RadioGroup',
@@ -109,6 +114,20 @@ const [Form] = useVbenForm({
       fieldName: 'beforeChange',
       label: '前置回调',
     },
+    {
+      component: 'Switch',
+      defaultValue: false,
+      fieldName: 'allowClear',
+      label: '允许清除',
+      help: '单选时是否允许取消选中（值为undefined）',
+    },
+    {
+      component: 'InputNumber',
+      defaultValue: 0,
+      fieldName: 'maxCount',
+      label: '最大选中数量',
+      help: '多选时有效，0表示不限制',
+    },
   ],
   showDefaultActions: false,
   submitOnChange: true,
@@ -186,6 +205,21 @@ function onBtnClick(value: any) {
           v-bind="compProps"
         />
       </div>
+      <p class="mt-4">自定义图标{{ checkValue }}</p>
+      <div class="mt-2 flex flex-col gap-2">
+        <VbenCheckButtonGroup
+          v-model="checkValue"
+          multiple
+          :options="options"
+          v-bind="compProps"
+        >
+          <template #icon="{ loading, checked }">
+            <LoaderCircle class="animate-spin" v-if="loading" />
+            <SquareCheckBig v-else-if="checked" />
+            <Square v-else />
+          </template>
+        </VbenCheckButtonGroup>
+      </div>
     </Card>
 
     <Card title="设置" class="mt-4">