docs: update vuepress site

- update to vuepress beta v48

Author: Ffloriel

docs/.vuepress/client.ts

@@ -0,0 +1,7 @@
+import { defineClientConfig } from "@vuepress/client";
+
+export default defineClientConfig({
+  enhance({ app, router, siteData }) {},
+  setup() {},
+  rootComponents: [],
+});

docs/.vuepress/config.ts

@@ -1,8 +1,8 @@
 import { defineUserConfig } from "vuepress";
-import { path } from "@vuepress/utils";
-import type { DefaultThemeOptions } from "vuepress";
+import localTheme from "./theme/index";
+import { searchPlugin } from "@vuepress/plugin-search";
 
-export default defineUserConfig<DefaultThemeOptions>({
+export default defineUserConfig({
   lang: "en-US",
   title: "PurgeCSS",
   description: "PurgeCSS is a tool to remove unused CSS from your project",
@@ -81,8 +81,7 @@ export default defineUserConfig<DefaultThemeOptions>({
       `,
     ],
   ],
-  theme: path.resolve(__dirname, "./theme/index.ts"),
-  themeConfig: {
+  theme: localTheme({
     logo: "https://i.imgur.com/UEiUiJ0.png",
     repo: "FullHuman/purgecss",
     navbar: [
@@ -203,6 +202,6 @@ export default defineUserConfig<DefaultThemeOptions>({
         },
       ],
     },
-  },
-  plugins: ["@vuepress/plugin-search"],
+  }),
+  plugins: [searchPlugin()],
 });

docs/.vuepress/theme/index.ts

@@ -1,15 +1,21 @@
 import type { ThemeObject } from "@vuepress/core";
 import { path } from "@vuepress/utils";
+import { ThemeFunction, defaultTheme, DefaultThemeOptions } from "vuepress";
 
-const localTheme: ThemeObject = {
-  name: "vuepress-theme-local",
-  extends: "@vuepress/theme-default",
-  layouts: {
-    Layout: path.resolve(__dirname, "layouts/Layout.vue"),
-  },
-  alias: {
-    "@theme/CarbonAds.vue": path.resolve(__dirname, "components/CarbonAds.vue"),
-  },
+const localTheme = (themeOptions: DefaultThemeOptions) => {
+  return {
+    name: "vuepress-theme-local",
+    extends: defaultTheme(themeOptions),
+    layouts: {
+      Layout: path.resolve(__dirname, "layouts/Layout.vue"),
+    },
+    alias: {
+      "@theme/CarbonAds.vue": path.resolve(
+        __dirname,
+        "components/CarbonAds.vue"
+      ),
+    },
+  };
 };
 
 export default localTheme;