Adding Wafrn PDS

pdslist.json

···
     ],
     "maintainer": "@joseli.to",
     "inviteCodeRequired": true
+  },
+  {
+    "url": "https://at.app.wafrn.net",
+    "supportedHandles": [
+      ".at.app.wafrn.net"
+    ],
+    "contactEmail": "[e-mail]",
+    "privacyUrl": "https://app.wafrn.net/article/system.privacy-policy",
+    "inviteCodeRequired": true
   }
 ]