Create Vercel verification JSON for alanmugambi

Add Vercel verification configuration for alanmugambi

domains/_vercel.alanmugambi.json

@@ -0,0 +1,11 @@
+{
+  "description": "Vercel verification for alanmugambi",
+  "repo": "https://github.com/lanoxi0us/Alan-Portfolio",
+  "owner": {
+    "username": "lanoxi0us",
+    "email": "alanmugambi2007@gmail.com"
+  },
+  "records": {
+    "TXT": ["vc-domain-verify=alanmugambi.is-a.dev,5fa10bdb444c0693727b"]
+  }
+}