refactor(tabs): optimize new tab button postion close #127 (#128)

packages/theme/src/tabs/index.less

@@ -33,6 +33,8 @@
     padding: 0;
     position: relative;
     margin: 0;
+    display: flex;
+    justify-content: space-between;
 
     .@{tabs-prefix-cls}__active-bar {
       position: absolute;

packages/vue/src/tabs/src/pc.vue

@@ -116,8 +116,8 @@ export default defineComponent({
 
     const header = (
       <div class={['tiny-tabs__header', `is-${position}`]}>
-        {newButton}
         {TabNavComponent}
+        {newButton}
       </div>
     )