Add missing Node engine restrictions to zod-plugin (#2912)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

- Documentation
- Added changelog entry for v2.0.0 documenting supported Node.js
versions: ^20.19.0 || ^22.12.0 || ^24.0.0.

- Chores
- Declared supported Node.js versions in package metadata to improve
install-time compatibility checks; users on unsupported Node versions
may see warnings or install blocks.
- Bumped package version to 2.0.0-beta.2; no functional or API changes.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: RobinTail

zod-plugin/CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## Version 2
+
+### v2.0.0
+
+- Restricting the supported Node.js versions: `^20.19.0 || ^22.12.0 || ^24.0.0`.
+
 ## Version 1
 
 ### v1.2.0

zod-plugin/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@express-zod-api/zod-plugin",
-  "version": "1.2.0",
+  "version": "2.0.0-beta.2",
   "license": "MIT",
   "description": "Zod plugin for express-zod-api",
   "sideEffects": true,
@@ -35,6 +35,9 @@
     "dist",
     "*.md"
   ],
+  "engines": {
+    "node": "^20.19.0 || ^22.12.0 || ^24.0.0"
+  },
   "dependencies": {
     "ramda": "catalog:prod"
   },