This pull request adds the iftee.is-a.dev subdomain.

The `iftee.json` file includes:
- An A record pointing to `216.198.79.193`
- A TXT record for Vercel domain verification

---
**Please ensure you meet the following requirements before creating the pull request:**

- [x] I have read and understood the `is-a.dev` guide.
- [x] My subdomain name is more than 2 characters long but less than 64 characters.
- [x] My subdomain name does not contain underscores, only dashes are permitted.
- [x] My subdomain name only uses standard English characters.
- [x] My JSON file is correctly formatted and validated.
- [x] I have replaced `your-github-username` with my actual GitHub username.
- [x] I have set the `RECORDTYPE` and `RECORDCONTENT` to match my DNS record requirements.

domains/iftee.json

@@ -0,0 +1,11 @@
+{
+    "owner": {
+        "username": "lonnewolf120",
+        "email": "iftekharulislam360@gmail.com"
+    },
+    "records": {
+        "A": ["216.198.79.193"],
+        "TXT": "vc-domain-verify=iftee.is-a.dev,9c1631c5b8872fd53360",
+        "URL": "https://founder.shalish.xyz"
+    }
+}