Set up automated CI testing and Dependabot integration

[mgajek-cern]

Description:
We need to implement automated testing and dependency management to avoid falling behind on updates.

Tasks:

• Set up CI pipeline with automated testing to verify functionality
• Add Dependabot for automated dependency updates

Acceptance Criteria:

• CI automatically runs tests on all PRs
• Dependabot creates PRs for dependency updates
• Clear process for reviewing and merging automated updates

Estimated Files to Create/Modify:

• .github/workflows/ci.yml - Main CI pipeline configuration
• .github/dependabot.yml - Dependabot configuration for dependency updates

NOTE: Dependabot only creates PRs and does not merge automatically, ensuring all updates are reviewed before deployment to avoid introducing breaking changes.