Add CI workflow

[n0y0nD]

Adds a CI workflow using GitHub Actions to build and test the project on each push and pull request.

The workflow:
• builds the project using cargo build
• runs tests using cargo test

[chatgpt-codex-connector]

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Reviewed commit: ea759e17b8

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[Gmin2]

see #16, can you both coordinate so that I can merge in one go so that CI does not give all red.

[Abd002]

@Gmin2 I think we should wait a bit before merging this PR. Since we are now moving towards adopting cups-rs with CUPS 3, the CI logic will likely change accordingly.

So it may be better to postpone this for now, and later @n0y0nD can update/create the CI workflow based on the new setup for the repository.

[n0y0nD]

@Abd002 Makes sense! I'll wait for the CUPS 3 migration to stabilize and update the CI accordingly.