Draft: feat: munLibOG

Co tenhle MR dělá? / What does this MR do?

OG pro městské knihovny.

Related issues

operator-ict/golemio/code/modules/municipal-libraries!20 (closed)

Developer checklist

• Ensure this change works
• Write unit tests for this change as needed
• Update the OpenAPI document if exists
• Ensure CI/CD pipeline passes
• Create or update the implementation documentation if necessary
• Include a changelog entry
• Request a review