Configure Renovate to automerge @types/* packages (#149)

Add packageRules to automerge TypeScript type definition packages
when CI passes. This reduces manual intervention for low-risk
dependency updates.

Fixes #148

Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>
Co-authored-by: Justin Bennett <just-be-dev@users.noreply.github.com>

Author: just-be-dev

renovate.json5

@@ -4,5 +4,12 @@
     "config:best-practices",
     "mergeConfidence:all-badges"
   ],
-  "minimumReleaseAge": "7 days"
+  "minimumReleaseAge": "7 days",
+  "packageRules": [
+    {
+      "description": "Automerge TypeScript type definitions if CI passes",
+      "matchPackagePatterns": ["^@types/"],
+      "automerge": true
+    }
+  ]
 }