refactor: remove guide route prefix (#11146)

* refactor: remove guide route prefix

* chore: implement backwards compat redirect

* Change guide redirect destination and permanence

Updated the redirect destination and permanence for the guide route.

---------

Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

apps/guide/content/docs/legacy/meta.json

@@ -1,9 +1,9 @@
 {
 	"pages": [
-		"[MessageCircleQuestion][FAQ](/guide/legacy/popular-topics/faq)",
-		"[ArrowDownToLine][Updating to v14](/guide/legacy/additional-info/changes-in-v14)",
+		"[MessageCircleQuestion][FAQ](/legacy/popular-topics/faq)",
+		"[ArrowDownToLine][Updating to v14](/legacy/additional-info/changes-in-v14)",
 		"[LibraryBig][Documentation](https://discord.js.org/docs)",
-		"[Info][Introduction](/guide/legacy)",
+		"[Info][Introduction](/legacy)",
 		"---Setup---",
 		"preparations",
 		"---Your App---",