Add notes.0xprathamesh.json for domain configuration

Add a nested subdomain for 0xprathamesh.is-a.dev

domains/notes.0xprathamesh.json

@@ -0,0 +1,9 @@
+{
+    "owner": {
+        "username": "prathameshrp",
+        "email": "prathamesh.math@gmail.com"
+    },
+    "records": {
+        "CNAME": "prathameshrp.github.io"
+    }
+}