refactor(dns): move to core package (#4687)

packages/common/package.json

@@ -8,7 +8,6 @@
     ".": "./index.ts",
     "./types": "./src/types.ts",
     "./server": "./src/server.ts",
-    "./init-dns": "./src/dns.ts",
     "./client": "./src/client.ts",
     "./env": "./env.ts"
   },
@@ -30,7 +29,6 @@
     "@homarr/core": "workspace:^0.1.0",
     "@paralleldrive/cuid2": "^3.1.0",
     "dayjs": "^1.11.19",
-    "dns-caching": "^0.2.9",
     "next": "16.0.10",
     "octokit": "^5.0.5",
     "react": "19.2.3",