feat: enable npm provenance for OIDC publishing

Add publishConfig with provenance enabled to support
trusted publishing via GitHub Actions OIDC authentication.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: spawnia

package.json

@@ -42,6 +42,10 @@
     "url": "https://github.com/mll-lab/react-components/issues"
   },
   "homepage": "https://github.com/mll-lab/react-components",
+  "publishConfig": {
+    "access": "public",
+    "provenance": true
+  },
   "peerDependencies": {
     "@babel/runtime": "^7.20.13",
     "react": ">=16.8.0",