feat(config): update site title and add navigation tab

blume.config.ts

@@ -1,6 +1,9 @@
 import { defineConfig } from "blume";
 
 export default defineConfig({
-  title: "Docs",
+  title: "Prad's LeetCode",
   description: "Documentation powered by Blume.",
+  navigation: {
+    tabs: [{ label: "Guides", path: "/guides", icon: "plug" }],
+  },
 });