feat(config): switch docs to Blume and adjust Wrangler config

docs/blume.config.ts

@@ -0,0 +1,19 @@
+import { defineConfig } from "blume";
+
+export default defineConfig({
+  title: "Odyssey",
+  logo: "https://avatars.githubusercontent.com/u/3804558?s=64&v=4",
+  description: "Documentation powered by Blume.",
+  content: {
+    root: "content",
+  },
+  deployment: {
+    site: "https://od.prad.codes",
+  },
+  navigation: {
+    tabs: [
+      { label: "Coding", path: "/coding" },
+      { label: "System Design", path: "/system-design" },
+    ],
+  },
+});