chore(SelectCustom): support by prop

src/runtime/components/forms/SelectCustom.vue

@@ -1,6 +1,7 @@
 <template>
   <Combobox
     v-slot="{ open }"
+    :by="by"
     :model-value="modelValue"
     :multiple="multiple"
     :nullable="nullable"
@@ -104,6 +105,10 @@ const props = defineProps({
     type: [String, Number, Object, Array],
     default: ''
   },
+  by: {
+    type: String,
+    default: undefined
+  },
   options: {
     type: Array as PropType<{ disabled?: boolean }[]>,
     default: () => []