notificationslisted

Scan recent Jira `@mention` events targeting the current user from issue descriptions and comments using `jirac`. Steps: 1. Check that `jirac` is available by running `jirac --version`. If missing, tell the user to install it (`cargo install jira-commands`). 2. Run `jirac issue notifications` to list recent mention events. 3. For each mention, the output shows the issue key, the author, and the source (description vs comment). 4. To inspect a specific mention in detail, follow up with `jirac issue view <KEY>`. Notes: - This scans **Jira-level @mentions** in description/comment ADF — not Jira's mobile/desktop notification feed. - Mentions are detected by matching the current user's account ID against the ADF mention nodes. - For a regular triage / standup flow, pair this with `jirac issue standup`. Examples: - "show my recent Jira mentions" → `jirac issue notifications` - "did anyone mention me this week" → `jirac issue notifications`