Bump the major group across 2 directories with 3 updates

Bumps the major group with 3 updates in the / directory: [which](https://github.com/npm/node-which), [zod](https://github.com/colinhacks/zod) and [vite-node](https://github.com/antfu-collective/vite-node).
Bumps the major group with 1 update in the /packages/varlock-docs-mcp directory: [zod](https://github.com/colinhacks/zod).


Updates `which` from 5.0.0 to 6.0.0
- [Release notes](https://github.com/npm/node-which/releases)
- [Changelog](https://github.com/npm/node-which/blob/main/CHANGELOG.md)
- [Commits](npm/node-which@v5.0.0...v6.0.0)

Updates `zod` from 3.25.76 to 4.1.12
- [Release notes](https://github.com/colinhacks/zod/releases)
- [Commits](colinhacks/zod@v3.25.76...v4.1.12)

Updates `vite-node` from 3.2.4 to 5.2.0
- [Release notes](https://github.com/antfu-collective/vite-node/releases)
- [Commits](antfu-collective/vite-node@v3.2.4...v5.2.0)

Updates `zod` from 3.25.76 to 4.1.12
- [Release notes](https://github.com/colinhacks/zod/releases)
- [Commits](colinhacks/zod@v3.25.76...v4.1.12)

Updates `zod` from 3.25.76 to 4.1.12
- [Release notes](https://github.com/colinhacks/zod/releases)
- [Commits](colinhacks/zod@v3.25.76...v4.1.12)

---
updated-dependencies:
- dependency-name: which
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: major
- dependency-name: zod
  dependency-version: 4.1.12
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: major
- dependency-name: vite-node
  dependency-version: 5.2.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: major
- dependency-name: zod
  dependency-version: 4.1.12
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: major
- dependency-name: zod
  dependency-version: 4.1.12
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: major
...

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

Author: dependabot[bot]

packages/varlock-docs-mcp/package.json

@@ -15,7 +15,7 @@
   "dependencies": {
     "@modelcontextprotocol/sdk": "1.20.2",
     "agents": "^0.2.8",
-    "zod": "^3.25.76"
+    "zod": "^4.1.12"
   },
   "devDependencies": {
     "@types/node": "catalog:",

packages/varlock/package.json

@@ -88,7 +88,7 @@
     "debug": "catalog:",
     "execa": "^9.6.0",
     "semver": "^7.7.3",
-    "which": "^5.0.0"
+    "which": "^6.0.0"
   },
   "devDependencies": {
     "@clack/core": "^0.5.0",