add MCP server badge

This PR adds a badge for the [mcp-shell-server](https://glama.ai/mcp/servers/rt2d4pbn22) server listing in Glama MCP server directory.

<a href="https://glama.ai/mcp/servers/rt2d4pbn22"><img width="380" height="200" src="https://glama.ai/mcp/servers/rt2d4pbn22/badge" alt="mcp-shell-server MCP server" /></a>

Glama performs regular codebase and documentation scans to:

* Confirm that the MCP server is working as expected
* Confirm that there are no obvious security issues with dependencies of the server
* Extract server characteristics such as tools, resources, prompts, and required parameters.

This badge helps your users to quickly asses that the MCP server is safe, server capabilities, and instructions for installing the server.

Author: punkpeye

README.md

@@ -4,6 +4,8 @@
 
 A secure shell command execution server implementing the Model Context Protocol (MCP). This server allows remote execution of whitelisted shell commands with support for stdin input.
 
+<a href="https://glama.ai/mcp/servers/rt2d4pbn22"><img width="380" height="200" src="https://glama.ai/mcp/servers/rt2d4pbn22/badge" alt="mcp-shell-server MCP server" /></a>
+
 ## Features
 
 * **Secure Command Execution**: Only whitelisted commands can be executed