Magpie Security Issue Import

apache/magpie-security-issue-import

| Scan <security-list> for reports that have not yet been copied into <tracker> as tracking issues, present the proposed imports to the user, and — defaulting to *import unless the user rejects upfront* — create the tracking issues with the `Needs triage` project-board status and draft a receipt-of- confirmation reply to each reporter. This is the first step of the thread into a tracker the rest of the skills (security-issue-sync, security-issue-fix, generate-cve-json) operate on.