Add WordPress debugging example to README

[VaibhavChhillar]

Problem

The README lacks real-world examples showing how chrome-devtools-mcp can
be used with popular CMS platforms like WordPress.

Solution

Added a WordPress-focused example demonstrating debugging and performance
analysis using Chrome DevTools MCP.

Impact

Helps developers understand practical MCP usage in production-like
WordPress environments.

Testing

Verified the steps on a local WordPress setup.

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[OrKoN]

Thanks for the PR but it does not seem to add any Wordpress specific details. Starting Chrome manually is not required to test Wordpress.