* Add GitLab CE entry to meta.json
- Introduced a new entry for GitLab Community Edition, including a detailed description, logo, and relevant links.
- Reformatted tag lists for consistency across all entries.
* Add Linkding entry to meta.json
- Introduced a new entry for Linkding, a self-hosted bookmark manager, including a description, logo, and relevant links.
- Updated tag lists to include "bookmark-manager" and "self-hosted" for better categorization.
