chore: declare lint.profile: rich (socket-lib runs richer oxlint config)

The fleet's standard oxlint plugin set (import, typescript, unicorn)
is enforced by sync-scaffolding's oxlint-profile check. socket-lib
ships a wider set (more plugins + stricter rules) — declare that
intent in .socket-repo-template.json so the check skips us instead
of flagging missing-plugin findings.

Pairs with socket-repo-template@ee1fc37 which switched the check
from a hardcoded `socket-lib` basename exemption to reading
lint.profile from the per-repo config.

Author: jdalton

.socket-repo-template.json

@@ -2,5 +2,8 @@
   "$schema": "./socket-repo-template-schema.json",
   "schemaVersion": 1,
   "repoName": "socket-lib",
-  "kind": "single-package"
+  "kind": "single-package",
+  "lint": {
+    "profile": "rich"
+  }
 }