feat: 添加 Umami 分析支持，更新配置文档

src/main.ts

@@ -1,6 +1,15 @@
 import { createApp } from "vue";
+import { VueUmamiPlugin } from "@jaseeey/vue-umami-plugin";
 import App from "./App.vue";
 import router from "./router";
 import "./styles.css";
+import siteConfig from "./config/siteConfig";
 
-createApp(App).use(router).mount("#app");
+const app = createApp(App);
+
+if (process.env.NODE_ENV !== "development") {
+    if (siteConfig.umami?.enable) {
+        app.use(VueUmamiPlugin({ websiteID: siteConfig.umami.websiteId, scriptSrc: siteConfig.umami.url, router }));
+    }
+}
+app.use(router).mount("#app");