Test Go linter

Summary by Bito

This PR establishes the initial project structure and CI/CD pipeline for a Go project, including .gitignore, .gitlab-ci.yml with test, security, and lint stages, and a basic unit test. It also implements error handling for AI agent operations in TypeScript and adds Karma configuration for Angular testing.

Unit tests added: True

Estimated effort to review (1-5, lower is better): 2