Open source CI build

[markoa]

Is your improvement proposal related to a problem? Please describe.

The workflows that are attached to commits and PRs point to a private project on Semaphore (404).

Describe the solution you'd like

Core builds should be public so anyone can contribute.

Describe alternatives you've considered

No response

Additional context

No response

[AleksandarCole]

@markoa thanks for logging this one.
We already have this discussion ongoing as there are few things left to figure out, however I realize now that we should move this to public discussion.

I've opened a new discussion here and will convert it to an issue once we're ready for implementation:
https://github.com/orgs/semaphoreio/discussions/92

Closing this one until then. Thank you for raising it 🙇