* Enhance meta.json: add GitLab Community Edition entry with detailed description, logo, and links; format tag lists for consistency.
* Refactor docker-compose.yml for GitLab CE: remove unnecessary version declaration, simplify port mappings, and eliminate unused network configurations.
* Add Casdoor and Zitadel blueprints: include docker-compose files, template configurations, and metadata entries with descriptions, logos, and links for both identity management platforms.
