Add OSINT Researcher

[nikolas-kraljevic]

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Summary by cubic

Added the OSINT Researcher resource to the catalog to help users explore GitHub orgs and repos.

Includes categories (Open Source, Analytics, Security) and keywords to improve search and discoverability.

^{Written for commit e0522a5. Summary will update automatically on new commits.}

[github-actions]

New resource link: https://osintresearcher.com/

[cubic-dev-ai]

No issues found across 1 file