feat(system user): add search button to user list page

add a primary styled search button with search icon to the query bar

client/src/views/system/user/index.vue

@@ -28,6 +28,10 @@
 					<a-select-option :value="1">启用</a-select-option>
 					<a-select-option :value="0">禁用</a-select-option>
 				</a-select>
+				<a-button type="primary" @click="handleSearch">
+					<template #icon><SearchOutlined /></template>
+					查询
+				</a-button>
 				<a-button @click="handleReset">
 					<template #icon><ReloadOutlined /></template>
 					重置