Revert "[ARF-87799] Remove 21a (#2269)"

This reverts commit 9c4b3f1.

Author: raudabaugh

src/applications/registry.json

@@ -1640,6 +1640,33 @@
       "includeBreadcrumbs": true
     }
   },
+  {
+    "appName": "21a Apply to become a VA-accredited attorney or claims agent",
+    "entryName": "representative-21a",
+    "rootUrl": "/representative/accreditation/attorney-claims-agent-form-21a",
+    "productId": "3daec032-fd6a-41de-94fd-9c5db96c79bf",
+    "template": {
+      "vagovprod": false,
+      "title": "Apply to become a VA accredited attorney or claims agent",
+      "description": "Apply to become a VA accredited attorney or claims agent (VA Form 21a)",
+      "layout": "page-react.html",
+      "includeBreadcrumbs": true,
+      "breadcrumbs_override": [
+        {
+          "name": "Home",
+          "path": ""
+        },
+        {
+          "name": "VA accreditation representatives",
+          "path": "accreditation"
+        },
+        {
+          "name": "Apply to become a VA accredited attorney or claims agent",
+          "path": "accreditation/attorney-claims-agent-form-21a"
+        }
+      ]
+    }
+  },
   {
     "appName": "Resources for schools",
     "entryName": "sco",