Add cnc-facing

[github-actions]

Adds cnc-facing to Macros & Utilities.

- [cnc-facing](https://facing.nottseter.no/) - Generates Z1 facing toolpaths for spoilboards, fixture plates, and stock flattening without a CAM workflow. ([Source code](https://github.com/nilsan/cnc-facing))

Closes #7. Suggested by @blackveilprecision.

Automated review

• Verdict: needs review (confidence 0.90, auto)
• The title identifies it as a Makera Z1 resource, and the proposed use fits the list's scope.
• The stated facing-job workflow fits Macros & Utilities.
• ⚠️ The page was reachable but provided no readable content beyond its title, so the claimed features and open-source status could not be verified.
• Link: reachable (HTTP 200)

Opened automatically by the awesome-bot workflow from an issue submission.