close-stale: close stale issues with workflow

[redzynix]

Add workflow to close stale issues.

Workflow will first mark the issue as stale if there is no activity for 60 days, and close it after the next 14 days if no action is taken.

Signed-off-by: Mateusz Redzynia [email protected]

[redzynix]

probe run: https://github.com/thesofproject/linux/actions/runs/17640250933/job/50125412162