Improve version management system

- Fix version-check.js to use git tag version for releases
- Add new-version.js script for proper version/tag synchronization
- Update package.json to correct version 1.1.0

The new-version.js script ensures package.json and git tags are always synchronized by:
1. Updating package.json with new version
2. Committing the change
3. Tagging the commit

This prevents version mismatches and git dirty states.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "jmespath-playground",
-  "version": "1.0.4",
+  "version": "1.1.0",
   "description": "A React-based web application for testing JMESPath expressions against JSON data",
   "main": "index.js",
   "scripts": {