feat: sort timeline view by due date

[biplavbarua]

Summary

This PR enables sorting the Timeline View by Due Date (target_date).

Changes

• Added 'target_date' to the order_by options in the Gantt chart layout configuration in 'packages/constants/src/issue/filter.ts'.

Why

Fixes #8267. This feature was requested to allow users to visualize work items based on their due dates in the timeline view, which helps in better deadline management.

---

[!NOTE] Enables due-date sorting in the Timeline/Gantt view.

• Adds "target_date" to order_by for issues.gantt_chart.display_filters in packages/constants/src/issue/filter.ts, allowing sorting by due date in the Gantt timeline

^{Written by Cursor Bugbot for commit 1ea72440222b0c1407533d62ce753c455ae4d9cd. This will update automatically on new commits. Configure here.}

Summary by CodeRabbit

• New Features
  • Users can now sort issues by target date when viewing the Gantt chart on their profile issues page, providing better visibility into project timelines.

_{✏️ Tip: You can customize this high-level summary in your review settings.}