Claude Desktop alternative config

Highlighting that while I was not able to configure Claude Desktop with the initial README suggestion, as it was complaining about not being able to authorise the WordPress.com connection:

```
{
"mcpServers": {
"wordpress-reader": {
"command": "node",
"args": ["FULL_PATH_TO_THIS_FOLDER/mcp-server/dist/index.js"],
}
}
}
```

this one seems to have worked

```
{
"mcpServers": {
"wordpress-reader": {
"auth_server_url": "http://localhost:3000",
"mcp_shared_secret": "MCP_SHARED_SECRET",
"disable_confidentiality_check": false
}
}
}
```

Maybe we can include in the main Docs. Thanks for developing this, really useful!

Start with the README and find the existing Claude Desktop configuration example. Add the working alternative using auth_server_url, mcp_shared_secret, and disable_confidentiality_check, while preserving the existing context. Done means the main documentation presents the alternative configuration clearly for Claude Desktop users.

Written by the indexing model from the issue text.