Create Vercel domain verification JSON file

Added Vercel domain ownership verification details.

domains/_vercel.natnaelgetahun.json

@@ -0,0 +1,11 @@
+{
+  "description": "Vercel domain ownership verification for natnaelgetahun.is-a.dev",
+  "repo": "https://github.com/Natnael-Getahun/my-site",
+  "owner": {
+    "username": "Natnael-Getahun",
+    "email": "nathanielfeatherson@gmail.com"
+  },
+  "records": {
+    "TXT": ["vc-domain-verify=natnaelgetahun.is-a.dev,d5c2543f0d495d72fb7b"]
+  }
+}