Meta: Add code owners

[ruben-iteng]

Description

Add basic code owners file for automatically assigning and notifying maintainers.

PR type

New feature (non-breaking change which adds functionality)

Linked Issue

#17

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (if applicable)
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works (if applicable)
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

Code of Conduct

By submitting this issue, you agree to follow our Code of Conduct

• I agree to follow this project's Code of Conduct

[IoannisP-ITENG]

I think there is trailing space before the dot

[IoannisP-ITENG]

Thanks! Looks good.