refactor: 升级vite至v6版本，升级sass至最新版，重构主题写法，弃用@pureadmin/theme (#1188)

* refactor: 升级`vite`至`v6`版本，升级`sass`至最新版，重构主题写法，删除`@pureadmin/theme`

src/layout/components/lay-sidebar/components/SidebarItem.vue

@@ -1,6 +1,6 @@
 <script setup lang="ts">
-import path from "path";
 import { getConfig } from "@/config";
+import { posix } from "path-browserify";
 import { menuType } from "@/layout/types";
 import { ReText } from "@/components/ReText";
 import { useNav } from "@/layout/hooks/useNav";
@@ -99,8 +99,7 @@ function resolvePath(routePath) {
   if (httpReg.test(routePath) || httpReg.test(props.basePath)) {
     return routePath || props.basePath;
   } else {
-    // 使用path.posix.resolve替代path.resolve 避免windows环境下使用electron出现盘符问题
-    return path.posix.resolve(props.basePath, routePath);
+    return posix.resolve(props.basePath, routePath);
   }
 }
 </script>

src/layout/components/lay-sidebar/components/SidebarLogo.vue

@@ -63,7 +63,7 @@ const { title, getLogo } = useNav();
       font-size: 18px;
       font-weight: 600;
       line-height: 32px;
-      color: $subMenuActiveText;
+      color: var(--pure-theme-sub-menu-active-text);
       text-overflow: ellipsis;
       white-space: nowrap;
     }