Add mugish.is-a.dev subdomain request

- Personal retro-themed developer portfolio
- Showcases web development skills and projects
- Hosted on Vercel at mugish-beldar.vercel.app
- Removed duplicate mugishbeldar.json file

domains/mugishbeldar.json

@@ -1,12 +0,0 @@
-{
-  "description": "Personal portfolio website",
-  "repo": "https://github.com/MugishBeldar/mugish.beldar",
-  "owner": {
-    "userName": "MugishBeldar",
-    "email": "mugishbeldar333@gmail.com"
-  },
-  "record": {
-    "URL":"https://mugishbeldar.github.io/mugish.beldar/",
-    "CNAME": "mugishbeldar.github.io"
-  }
-}