fix: move Auth error codes to top level (#29254)

* fix: move error codes to top level

* fix: remove stray newlines

* fix: merge all error sections into central location

* fix: add section heading above table

apps/docs/components/Navigation/NavigationMenu/NavigationMenu.constants.ts

@@ -504,6 +504,7 @@ export const auth = {
         },
       ],
     },
+
     {
       name: 'Concepts',
       items: [
@@ -583,6 +584,10 @@ export const auth = {
         },
       ],
     },
+    {
+      name: 'Debugging',
+      items: [{ name: 'Error Codes', url: '/guides/auth/debugging/error-codes' }],
+    },
     {
       name: 'Third-party auth',
       items: [