Fix review issues: badge count, docstring, test.sh permissions

- Fix engines badge: 107 -> 112 to match actual file count
- Add validate.yml CI badge to README
- Fix build-engines.py docstring (was "MCP usage" from copy)
- Add execute permission to test.sh

Made-with: Cursor

Author: Vlad M

README.md

@@ -3,8 +3,9 @@
 A [Cursor plugin](https://cursor.com/docs/plugins) that gives Cursor Agent the ability to search Google, Amazon, Walmart, YouTube, Google Maps, Google Scholar, and [100+ other engines](https://serpapi.com/search-engine-apis) via the [SerpApi](https://serpapi.com) REST API.
 
 [![MIT License](https://img.shields.io/badge/license-MIT-green.svg)](LICENSE)
-[![Engines](https://img.shields.io/badge/engines-107-blue.svg)](engines/)
-[![CI](https://github.com/serpapi/serpapi-cursor-plugin/actions/workflows/update-engines.yml/badge.svg)](https://github.com/serpapi/serpapi-cursor-plugin/actions/workflows/update-engines.yml)
+[![Engines](https://img.shields.io/badge/engines-112-blue.svg)](engines/)
+[![Validate](https://github.com/serpapi/serpapi-cursor-plugin/actions/workflows/validate.yml/badge.svg)](https://github.com/serpapi/serpapi-cursor-plugin/actions/workflows/validate.yml)
+[![Update Engines](https://github.com/serpapi/serpapi-cursor-plugin/actions/workflows/update-engines.yml/badge.svg)](https://github.com/serpapi/serpapi-cursor-plugin/actions/workflows/update-engines.yml)
 
 ## Quick Start
 

build-engines.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-"""Build SerpApi engine parameter data for MCP usage."""
+"""Build SerpApi engine parameter schemas from the playground."""
 
 from __future__ import annotations