feat(config): add custom redirects to Blume config

apps/docs/blume.config.ts

@@ -1,5 +1,7 @@
 import { defineConfig } from "blume";
 
+import redirects from "./redirects";
+
 // Blume's defaults (`inter`, `ibm-plex-mono`) are fetched from fonts.gstatic.com
 // on every build, which has timed out on the Pages runner and, fully offline,
 // silently ships no fonts at all. The same two families from Fontsource, as
@@ -27,6 +29,7 @@ export default defineConfig({
     base: "/leetcode",
   },
   lastModified: "git",
+  redirects,
   content: {
     root: "content",
   },