chore(deps): bump jsondiffpatch and ai

Removes [jsondiffpatch](https://github.com/benjamine/jsondiffpatch). It's no longer used after updating ancestor dependency [ai](https://github.com/vercel/ai). These dependencies need to be updated together.


Removes `jsondiffpatch`

Updates `ai` from 4.3.19 to 5.0.48
- [Release notes](https://github.com/vercel/ai/releases)
- [Changelog](https://github.com/vercel/ai/blob/main/CHANGELOG.md)
- [Commits](https://github.com/vercel/ai/compare/ai@4.3.19...ai@5.0.48)

---
updated-dependencies:
- dependency-name: jsondiffpatch
  dependency-version: 
  dependency-type: indirect
- dependency-name: ai
  dependency-version: 5.0.48
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package-lock.json

@@ -46,7 +46,7 @@
     "@nanostores/react": "^0.7.2",
     "@octokit/auth-oauth-app": "^8.1.0",
     "@octokit/oauth-authorization-url": "^7.1.0",
-    "ai": "^4.3.16",
+    "ai": "^5.0.59",
     "astro": "^5.13.5",
     "flexsearch": "^0.7.43",
     "gray-matter": "^4.0.3",