add MCP server badge

[punkpeye]

This PR adds a badge for the mcp-for-apache-ofbiz server listing in Glama MCP server directory.

Glama performs regular codebase and documentation checks 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 assess that the MCP server is safe, server capabilities, and instructions for installing the server.

[punkpeye]

Realized that GitHub does not recognize the project license

https://docs.github.com/en/communities/setting-up-your-project-for-healthy-contributions/adding-a-license-to-a-repository

Would you mind adding one?

[jacopoc]

Thank you for your comments.
About the license: this project is already licensed under the Apache License Version 2.0. You can find the LICENSE file in the project root folder.
As regards Glama's badge, I frankly don't know the reason it shows "no license" since the license check is successful in the Glama's rating page:
https://glama.ai/mcp/servers/@jacopoc/mcp-for-apache-ofbiz/score

Regards,
Jacopo