feat[domains]: add raexera.json verified domain

domains/_github-pages-challenge-raexera.raexera.json

@@ -0,0 +1,9 @@
+{
+    "owner": {
+        "username": "raexera",
+        "email": "raexera@gmail.com"
+    },
+    "records": {
+        "TXT": "9db2c1670295682ad6274f342d02ec"
+    }
+}