feat: 新增左树右表布局组件GiLeftRightPane封装，分割面板组件GiSplitPaneButton封装，以及代码优化（同步 GiDemo 更新）

src/layout/components/Main.vue

@@ -3,7 +3,7 @@
     <router-view v-slot="{ Component, route }">
       <transition :name="appStore.transitionName" mode="out-in" appear>
         <keep-alive :include="(tabsStore.cacheList as string[])">
-          <component :is="Component" :key="route.path + String(tabsStore.reloadFlag)" />
+          <component :is="Component" v-if="tabsStore.reloadFlag" :key="route.path" />
         </keep-alive>
       </transition>
     </router-view>