k3screenctrl: add new package - #30281

Checking PR #30281: k3screenctrl: add new package (Formalities Audit)

✅ Pull request originates from a dedicated feature branch (feature_k3screenctrl)

Commit 5d4b244 - feat: add k3screenctrl:

✅ Author and committer identities are valid
✅ Commit is not a merge commit
✅ Commit subject layout and length are valid: "feat: add k3screenctrl"
✅ Commit description lines adhere to width formatting rules
✅ Commit contains a valid 'Signed-off-by:' line matching author or committer
✅ Excellent! Commit contains a valid cryptographic signature (GPG/SSH). Thank you for signing your work! (SSH Key Fingerprint: SHA256:vFXM8T8rNespKZ+wjn1W2VdNW0nfEaqDn8Y2T8Ia4os)
⚠️ Warning: No reference link (e.g., upstream release notes, changelog, or history URL) detected in description.