feat: GiForm 支持 label 自定义渲染，以及插槽自定义渲染（同步 GiDemo 更新）

src/components/GiForm/src/GiForm.vue

@@ -7,9 +7,13 @@
           :span="item.span || options.gridItem?.span"
         >
           <a-form-item
-            v-bind="item.formItemProps" :label="item.label" :field="item.field" :rules="item.rules"
+            v-bind="item.formItemProps" :field="item.field" :rules="item.rules"
             :disabled="isDisabled(item.disabled)"
           >
+            <template #label>
+              <template v-if="typeof item.label === 'string'">{{ item.label }}</template>
+              <component :is="item.label" v-else></component>
+            </template>
             <slot
               v-if="!['group-title'].includes(item.type || '')" :name="item.field"
               v-bind="{ disabled: isDisabled(item.disabled) }"
@@ -25,7 +29,12 @@
                 :is="`a-${item.type}`" v-else v-bind="getComponentBindProps(item)"
                 :model-value="modelValue[item.field as keyof typeof modelValue]"
                 @update:model-value="valueChange($event, item.field)"
-              ></component>
+              >
+                <template v-for="(slotValue, slotKey) in item?.slots" :key="slotKey" #[slotKey]>
+                  <template v-if="typeof slotValue === 'string'">{{ slotValue }}</template>
+                  <component :is="slotValue" v-else></component>
+                </template>
+              </component>
             </slot>
             <slot v-else name="group-title">
               <a-alert v-bind="item.props">{{ item.label }}</a-alert>